diff --git a/api/@ohos.file.cloudSync.d.ts b/api/@ohos.file.cloudSync.d.ts
index cc691f3d943fbc4df1ce3b0618d7897414de7817..0d4a9938deea2c1b949fe89641bd98c08114893f 100644
--- a/api/@ohos.file.cloudSync.d.ts
+++ b/api/@ohos.file.cloudSync.d.ts
@@ -25,8 +25,7 @@ import type { AsyncCallback, Callback } from './@ohos.base';
  *
  * @namespace cloudSync
  * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
- * @since arkts{ '1.1':'11','1.2':'20'}
- * @arkts 1.1&1.2
+ * @since 11
  */
 declare namespace cloudSync {
   /**
@@ -34,58 +33,51 @@ declare namespace cloudSync {
    *
    * @enum { number }
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-   * @since arkts{ '1.1':'12','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 12
    */
   enum SyncState {
     /**
      * Indicates that the sync state is uploading.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     UPLOADING = 0,
     /**
      * Indicates that the sync failed in upload processing.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     UPLOAD_FAILED = 1,
     /**
      * Indicates that the sync state is downloading.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     DOWNLOADING = 2,
     /**
      * Indicates that the sync failed in download processing.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     DOWNLOAD_FAILED = 3,
     /**
      * Indicates that the sync finish.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     COMPLETED = 4,
     /**
      * Indicates that the sync has been stopped.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
-    STOPPED = 5,
+    STOPPED = 5
   }
 
   /**
@@ -93,75 +85,65 @@ declare namespace cloudSync {
    *
    * @enum { number }
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-   * @since arkts{ '1.1':'12','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 12
    */
   enum ErrorType {
     /**
      * No error occurred.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     NO_ERROR = 0,
     /**
      * Synchronization aborted due to network unavailable.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     NETWORK_UNAVAILABLE = 1,
     /**
      * Synchronization aborted due to wifi unavailable.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     WIFI_UNAVAILABLE = 2,
     /**
      * Synchronization aborted due to low capacity level.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     BATTERY_LEVEL_LOW = 3,
     /**
      * Synchronization aborted due to warning low capacity level.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     BATTERY_LEVEL_WARNING = 4,
     /**
      * Synchronization aborted due to cloud storage is full.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     CLOUD_STORAGE_FULL = 5,
     /**
      * Synchronization aborted due to local storage is full.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     LOCAL_STORAGE_FULL = 6,
     /**
      * Synchronization aborted due to device temperature is too high.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
-    DEVICE_TEMPERATURE_TOO_HIGH = 7,
-    
+    DEVICE_TEMPERATURE_TOO_HIGH = 7
   }
 
   /**
@@ -169,8 +151,7 @@ declare namespace cloudSync {
    *
    * @interface SyncProgress
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-   * @since arkts{ '1.1':'12','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 12
    */
   interface SyncProgress {
     /**
@@ -178,8 +159,7 @@ declare namespace cloudSync {
      *
      * @type { SyncState }
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     state: SyncState;
     /**
@@ -187,8 +167,7 @@ declare namespace cloudSync {
      *
      * @type { ErrorType }
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     error: ErrorType;
   }
@@ -198,8 +177,7 @@ declare namespace cloudSync {
    *
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
    * @systemapi
-   * @since arkts{ '1.1':'10','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 10
    */
   class GallerySync {
     /**
@@ -207,8 +185,7 @@ declare namespace cloudSync {
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     constructor();
     /**
@@ -224,8 +201,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 13600001 - IPC error
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     on(evt: 'progress', callback: (pg: SyncProgress) => void): void;
     /**
@@ -241,8 +217,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 13600001 - IPC error
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     off(evt: 'progress', callback: (pg: SyncProgress) => void): void;
     /**
@@ -257,8 +232,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 13600001 - IPC error
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     off(evt: 'progress'): void;
     /**
@@ -274,8 +248,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 22400003 - Low battery level.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     start(): Promise<void>;
     /**
@@ -292,8 +265,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 22400003 - Low battery level.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     start(callback: AsyncCallback<void>): void;
     /**
@@ -306,8 +278,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 401 - The input parameter is invalid.Possible causes:Incorrect parameter types.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     stop(): Promise<void>;
     /**
@@ -321,8 +292,7 @@ declare namespace cloudSync {
      * <br>2.Incorrect parameter types.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     stop(callback: AsyncCallback<void>): void;
   }
@@ -332,42 +302,37 @@ declare namespace cloudSync {
    *
    * @enum { number }
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-   * @since arkts{ '1.1':'11','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 11
    */
   enum State {
     /**
      * Indicates that the download task in process now.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     RUNNING = 0,
     /**
      * Indicates that the download task finished.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     COMPLETED = 1,
     /**
      * Indicates that the download task failed.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     FAILED = 2,
     /**
      * Indicates that the download task stopped.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
-    STOPPED = 3,
+    STOPPED = 3
   }
 
   /**
@@ -375,58 +340,51 @@ declare namespace cloudSync {
    *
    * @enum { number }
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-   * @since arkts{ '1.1':'11','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 11
    */
   enum DownloadErrorType {
     /**
      * No error occurred.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     NO_ERROR = 0,
     /**
      * download aborted due to unknown error.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     UNKNOWN_ERROR = 1,
     /**
      * download aborted due to network unavailable.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     NETWORK_UNAVAILABLE = 2,
     /**
      * download aborted due to local storage is full.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     LOCAL_STORAGE_FULL = 3,
     /**
      * download aborted due to content is not found in the cloud.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     CONTENT_NOT_FOUND = 4,
     /**
      * download aborted due to frequent user requests.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
-    FREQUENT_USER_REQUESTS = 5,
+    FREQUENT_USER_REQUESTS = 5
   }
 
   /**
@@ -434,8 +392,7 @@ declare namespace cloudSync {
    *
    * @interface DownloadProgress
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-   * @since arkts{ '1.1':'11','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 11
    */
   interface DownloadProgress {
     /**
@@ -443,8 +400,7 @@ declare namespace cloudSync {
      *
      * @type { State }
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     state: State;
     /**
@@ -452,8 +408,7 @@ declare namespace cloudSync {
      *
      * @type { number }
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     processed: number;
     /**
@@ -461,8 +416,7 @@ declare namespace cloudSync {
      *
      * @type { number }
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     size: number;
     /**
@@ -470,8 +424,7 @@ declare namespace cloudSync {
      *
      * @type { string }
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     uri: string;
     /**
@@ -479,19 +432,168 @@ declare namespace cloudSync {
      *
      * @type { DownloadErrorType }
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
+     * @since 11
+     */
+    error: DownloadErrorType;
+  }
+
+  /**
+   * Describes the download file type.
+   * @enum { number }
+   * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+   * @since 20
+   * @arkts 1.1&1.2
+   */
+  enum DownloadFileType {
+    /**
+     * Content file type.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    CONTENT = 0,
+    /**
+     * Thumbnail file type.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    THUMBNAIL = 1,
+    /**
+     * LCD file type.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    LCD = 2
+  }
+
+  /**
+   * FailedFileInfo struct.
+   * @interface FailedFileInfo
+   * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+   * @since 20
+   * @arkts 1.1&1.2
+   */
+  interface FailedFileInfo {
+    /**
+     * The uri of the file that failes to be downloaded.
+     * @type { string }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    uri: string;
+    /**
+     * Error code of the file that failes to be downloaded.
+     * @type { DownloadErrorType }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
      * @arkts 1.1&1.2
      */
     error: DownloadErrorType;
   }
 
+  /**
+   * MultiDownloadProgress object.
+   * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+   * @since 20
+   * @arkts 1.1&1.2
+   */
+  class MultiDownloadProgress {
+    /**
+     * The current download state.
+     * @type { State }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    state: State;
+    /**
+     * The download ID of the batch files.
+     * @type { number }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    taskId: number;
+    /**
+     * The number of files that downloaded successfully
+     * @type { number }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    successfulCount: number;
+    /**
+     * The number of files that fail to be downloaded.
+     * @type { number }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    failedCount: number;
+    /**
+     * Total number of the batch files.
+     * @type { number }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    totalCount: number;
+    /**
+     * Total size of downloaded files.
+     * @type { number }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    downloadedSize: number;
+    /**
+     * Total size of the batch files.
+     * @type { number }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    totalSize: number;
+    /**
+     * The error type of download.
+     * @type { DownloadErrorType }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    errType: DownloadErrorType;
+    /**
+     * Get the list of files that fail to be downloaded.
+     * @returns { Array<FailedFileInfo> } - Return list of files that fail to be downloaded.
+     * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+     *     <br>1.Failed to access the database or execute the SQL statement.
+     *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    getFailedFiles(): Array<FailedFileInfo>;
+    /**
+     * Get the list of files that are successfully downloaded.
+     * @returns { Array<string> } - Return list of files that are successfully downloaded.
+     * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+     *     <br>1.Failed to access the database or execute the SQL statement.
+     *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    getSuccessfulFiles(): Array<string>;
+  }
   /**
    * Download object.
    *
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
    * @systemapi
-   * @since arkts{ '1.1':'10','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 10
    */
   class Download {
     /**
@@ -499,8 +601,7 @@ declare namespace cloudSync {
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     constructor();
     /**
@@ -516,8 +617,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 13600001 - IPC error
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     on(evt: 'progress', callback: (pg: DownloadProgress) => void): void;
     /**
@@ -533,8 +633,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 13600001 - IPC error
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     off(evt: 'progress', callback: (pg: DownloadProgress) => void): void;
     /**
@@ -549,8 +648,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 13600001 - IPC error
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     off(evt: 'progress'): void;
     /**
@@ -567,8 +665,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 13900025 - No space left on device.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     start(uri: string): Promise<void>;
     /**
@@ -585,8 +682,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 13900025 - No space left on device.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     start(uri: string, callback: AsyncCallback<void>): void;
     /**
@@ -601,8 +697,7 @@ declare namespace cloudSync {
      * <br>2.Incorrect parameter types.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     stop(uri: string): Promise<void>;
     /**
@@ -617,8 +712,7 @@ declare namespace cloudSync {
      * <br>2.Incorrect parameter types.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'10','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 10
      */
     stop(uri: string, callback: AsyncCallback<void>): void;
   }
@@ -627,8 +721,7 @@ declare namespace cloudSync {
    * FileSync object.
    *
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-   * @since arkts{ '1.1':'12','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 12
    */
   class FileSync {
     /**
@@ -636,8 +729,7 @@ declare namespace cloudSync {
      *
      * @throws { BusinessError } 401 - The input parameter is invalid.Possible causes:Incorrect parameter types.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     constructor();
     /**
@@ -649,8 +741,7 @@ declare namespace cloudSync {
      * <br>2.Incorrect parameter types.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     constructor(bundleName: string);
     /**
@@ -662,8 +753,7 @@ declare namespace cloudSync {
      * <br>2.Incorrect parameter types.
      * @throws { BusinessError } 13600001 - IPC error
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     on(event: 'progress', callback: Callback<SyncProgress>): void;
     /**
@@ -674,8 +764,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 401 - The input parameter is invalid.Possible causes:1.Mandatory parameters are left unspecified;2.Incorrect parameter types.
      * @throws { BusinessError } 13600001 - IPC error
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     off(event: 'progress', callback?: Callback<SyncProgress>): void;
     /**
@@ -688,8 +777,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 22400002 - Network unavailable.
      * @throws { BusinessError } 22400003 - Low battery level.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     start(): Promise<void>;
     /**
@@ -702,8 +790,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 22400002 - Network unavailable.
      * @throws { BusinessError } 22400003 - Low battery level.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     start(callback: AsyncCallback<void>): void;
     /**
@@ -713,8 +800,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 401 - The input parameter is invalid.Possible causes:Incorrect parameter types.
      * @throws { BusinessError } 13600001 - IPC error.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     stop(): Promise<void>;
     /**
@@ -725,8 +811,7 @@ declare namespace cloudSync {
      * <br>2.Incorrect parameter types.
      * @throws { BusinessError } 13600001 - IPC error.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     stop(callback: AsyncCallback<void>): void;
     /**
@@ -736,8 +821,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 401 - The input parameter is invalid.Possible causes:Incorrect parameter types.
      * @throws { BusinessError } 13600001 - IPC error.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     getLastSyncTime(): Promise<number>;
     /**
@@ -748,8 +832,7 @@ declare namespace cloudSync {
      * <br>2.Incorrect parameter types.
      * @throws { BusinessError } 13600001 - IPC error.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     getLastSyncTime(callback: AsyncCallback<number>): void;
   }
@@ -757,8 +840,7 @@ declare namespace cloudSync {
    * CloudFileCache object.
    *
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-   * @since arkts{ '1.1':'11','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 11
    */
   class CloudFileCache {
     /**
@@ -766,8 +848,7 @@ declare namespace cloudSync {
      *
      * @throws { BusinessError } 401 - The input parameter is invalid.Possible causes:Incorrect parameter types.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     constructor();
     /**
@@ -779,10 +860,24 @@ declare namespace cloudSync {
      * <br>2.Incorrect parameter types.
      * @throws { BusinessError } 13600001 - IPC error
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     on(event: 'progress', callback: Callback<DownloadProgress>): void;
+    /**
+     * Subscribes to a batch of cloud file cache download progress change event. This method uses a callback to get download progress changes.
+     *
+     * @param { 'batchDownload' } event - event type.
+     * @param { Callback<MultiDownloadProgress> } callback - callback function with a `MultiDownloadProgress` argument.
+     * @throws { BusinessError } 13900020 - Parameter error. Possible causes:
+     *     <br>1.Mandatory parameters are left unspecified; 2.Incorrect parameter types.
+     * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+     *     <br>1.Failed to access the database or execute the SQL statement.
+     *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    on(event: 'batchDownload', callback: Callback<MultiDownloadProgress>): void;
     /**
      * Unsubscribes from cloud file cache download progress event.
      *
@@ -792,11 +887,24 @@ declare namespace cloudSync {
      * <br>2.Incorrect parameter types.
      * @throws { BusinessError } 13600001 - IPC error
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     off(event: 'progress', callback?: Callback<DownloadProgress>): void;
-
+    /**
+     * Unsubscribes from cloud file cache download progress event.
+     *
+     * @param { 'batchDownload' } event - event type.
+     * @param { Callback<MultiDownloadProgress> } [callback] - callback function with a `MultiDownloadProgress` argument.
+     * @throws { BusinessError } 13900020 - Parameter error. Possible causes:
+     *     <br>1.Mandatory parameters are left unspecified; 2.Incorrect parameter types.
+     * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+     *     <br>1.Failed to access the database or execute the SQL statement.
+     *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    off(event: 'batchDownload', callback?: Callback<MultiDownloadProgress>): void;
     /**
      * Start the cloud file cache download task.
      *
@@ -809,8 +917,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 13900025 - No space left on device.
      * @throws { BusinessError } 14000002 - Invalid URI.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     start(uri: string): Promise<void>;
     /**
@@ -825,10 +932,28 @@ declare namespace cloudSync {
      * @throws { BusinessError } 13900025 - No space left on device.
      * @throws { BusinessError } 14000002 - Invalid URI.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     start(uri: string, callback: AsyncCallback<void>): void;
+    /**
+     * Batch start the cloud file cache download task.
+     *
+     * @param { Array<string> } uris - The list of uri of file.
+     * @param { DownloadFileType } fileType - download file type.
+     * @returns { Promise<number> } - Return the downloadId in Promise mode.
+     * @throws { BusinessError } 13600001 - IPC error. Possible causes:
+     *     <br>1.IPC failed or timed out. 2.Failed to load the service.
+     * @throws { BusinessError } 13900020 - Parameter error. Possible causes:
+     *     <br>1.Mandatory parameters are left unspecified; 2.Incorrect parameter types.
+     * @throws { BusinessError } 22400004 - Exceed the maximum limit.
+     * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+     *     <br>1.Failed to access the database or execute the SQL statement.
+     *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    startBatch(uris: Array<string>, fileType?: DownloadFileType): Promise<number>;
     /**
      * Stop the cloud file cache download task.
      *
@@ -854,8 +979,7 @@ declare namespace cloudSync {
      * @throws { BusinessError } 13900002 - No such file or directory.
      * @throws { BusinessError } 14000002 - Invalid URI.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     stop(uri: string, needClean?: boolean): Promise<void>;
     /**
@@ -869,10 +993,27 @@ declare namespace cloudSync {
      * @throws { BusinessError } 13900002 - No such file or directory.
      * @throws { BusinessError } 14000002 - Invalid URI.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     stop(uri: string, callback: AsyncCallback<void>): void;
+    /**
+     * Batch stop the cloud file caches download task.
+     *
+     * @param { number } downloadId - The download ID of a batch of file cache.
+     * @param { boolean } [needClean] - whether to delete the file that already downloaded.
+     * @returns { Promise<void> } - Return Promise.
+     * @throws { BusinessError } 13600001 - IPC error. Possible causes:
+     *     <br>1.IPC failed or timed out. 2.Failed to load the service.
+     * @throws { BusinessError } 13900020 - Parameter error. Possible causes:
+     *     <br>1.Mandatory parameters are left unspecified; 2.Incorrect parameter types.
+     * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+     *     <br>1.Failed to access the database or execute the SQL statement.
+     *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    stopBatch(downloadId: number, needClean?: boolean): Promise<void>;
     /**
      * Clean the local file cache.
      *
@@ -887,10 +1028,81 @@ declare namespace cloudSync {
      * @throws { BusinessError } 14000002 - Invalid URI.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     cleanCache(uri: string): void;
+    /**
+     * Clean local content of the file that has been synced to the Cloud
+     *
+     * @param { string } uri - uri of file.
+     * @throws { BusinessError } 13600001 - IPC error. Possible causes:
+     *     <br>1.IPC failed or timed out. 2.Failed to load the service.
+     * @throws { BusinessError } 13900002 - No such file or directory.
+     * @throws { BusinessError } 13900010 - Try again.
+     * @throws { BusinessError } 13900012 - Permission denied by the file system
+     * @throws { BusinessError } 13900020 - Parameter error. Possible causes:
+     *     <br>1.Mandatory parameters are left unspecified; 2.Incorrect parameter types.
+     * @throws { BusinessError } 14000002 - Invalid URI.
+     * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+     *     <br>1.Failed to access the database or execute the SQL statement.
+     *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    cleanFileCache(uri: string): void;
+  }
+
+  /**
+   * Describes the external sync state of file.
+   * @enum { number }
+   * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+   * @since 20
+   * @arkts 1.1&1.2
+   */
+  enum FileState {
+    /**
+     * Indicates the initial state after a file is downloaded from the cloud to the local host.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    INITIAL_AFTER_DOWNLOAD = 0,
+    /**
+     * Indicates that the file is uploading now.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    UPLOADING = 1,
+    /**
+     * Indicates that the file sync task stopped.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    STOPPED = 2,
+    /**
+     * Indicates that the file is waiting for upload.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    TO_BE_UPLOADED = 3,
+    /**
+     * Indicates that the file has been already uploaded successfully.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    UPLOAD_SUCCESS = 4,
+    /**
+     * Indicates that the file upload failure
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    UPLOAD_FAILURE = 5
   }
 
   /**
@@ -899,8 +1111,7 @@ declare namespace cloudSync {
    * @enum { number }
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
    * @systemapi
-   * @since arkts{ '1.1':'11','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 11
    */
   enum FileSyncState {
     /**
@@ -908,8 +1119,7 @@ declare namespace cloudSync {
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     UPLOADING = 0,
     /**
@@ -917,8 +1127,7 @@ declare namespace cloudSync {
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     DOWNLOADING = 1,
     /**
@@ -926,8 +1135,7 @@ declare namespace cloudSync {
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     COMPLETED = 2,
     /**
@@ -935,8 +1143,7 @@ declare namespace cloudSync {
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'11','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 11
      */
     STOPPED = 3,
     /**
@@ -944,8 +1151,7 @@ declare namespace cloudSync {
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     TO_BE_UPLOADED = 4,
     /**
@@ -953,8 +1159,7 @@ declare namespace cloudSync {
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     UPLOAD_SUCCESS = 5,
     /**
@@ -962,10 +1167,9 @@ declare namespace cloudSync {
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
-    UPLOAD_FAILURE = 6,
+    UPLOAD_FAILURE = 6
   }
 
   /**
@@ -983,8 +1187,7 @@ declare namespace cloudSync {
    * @throws { BusinessError } 14000002 - Invalid URI.
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
    * @systemapi
-   * @since arkts{ '1.1':'11','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 11
    */
   function getFileSyncState(uri: Array<string>): Promise<Array<FileSyncState>>;
   /**
@@ -1002,8 +1205,7 @@ declare namespace cloudSync {
    * @throws { BusinessError } 14000002 - Invalid URI.
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
    * @systemapi
-   * @since arkts{ '1.1':'11','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 11
    */
   function getFileSyncState(uri: Array<string>, callback: AsyncCallback<Array<FileSyncState>>): void;
   /**
@@ -1019,14 +1221,36 @@ declare namespace cloudSync {
    * @throws { BusinessError } 13900010 - Try again
    * @throws { BusinessError } 13900012 - Permission denied by the file system
    * @throws { BusinessError } 13900031 - Function not implemented
-   * @throws { BusinessError } 13900042 - Unknown error 
+   * @throws { BusinessError } 13900042 - Unknown error
    * @throws { BusinessError } 14000002 - Invalid URI.
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
    * @systemapi
-   * @since arkts{ '1.1':'12','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 12
    */
   function getFileSyncState(uri: string): FileSyncState;
+  /**
+   * Get the sync state of the specified file.
+   *
+   * @param { string } uri - uri of file.
+   * @returns { FileState } - return the sync state of the specified file.
+   * @throws { BusinessError } 13600001 - IPC error. Possible causes:
+   *     <br>1.IPC failed or timed out. 2.Failed to load the service.
+   * @throws { BusinessError } 13900002 - No such file or directory.
+   * @throws { BusinessError } 13900004 - Interrupted system call
+   * @throws { BusinessError } 13900010 - Try again
+   * @throws { BusinessError } 13900012 - Permission denied by the file system
+   * @throws { BusinessError } 13900020 - Parameter error. Possible causes:
+   *     <br>1.Mandatory parameters are left unspecified; 2.Incorrect parameter types.
+   * @throws { BusinessError } 13900031 - Function not implemented
+   * @throws { BusinessError } 14000002 - Invalid URI.
+   * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+   *     <br>1.Failed to access the database or execute the SQL statement.
+   *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+   * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+   * @since 20
+   * @arkts 1.1&1.2
+   */
+  function getCoreFileSyncState(uri: string): FileState;
   /**
    * Register change notify for the specified uri.
    *
@@ -1040,8 +1264,7 @@ declare namespace cloudSync {
    * @throws { BusinessError } 13900012 - Permission denied
    * @throws { BusinessError } 14000002 - Invalid URI.
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-   * @since arkts{ '1.1':'12','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 12
    */
   function registerChange(uri: string, recursion: boolean, callback: Callback<ChangeData>): void;
   /**
@@ -1055,8 +1278,7 @@ declare namespace cloudSync {
    * @throws { BusinessError } 13900012 - Permission denied
    * @throws { BusinessError } 14000002 - Invalid URI.
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-   * @since arkts{ '1.1':'12','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 12
    */
   function unregisterChange(uri: string): void;
 
@@ -1065,98 +1287,87 @@ declare namespace cloudSync {
    *
    * @enum { number } NotifyType
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-   * @since arkts{ '1.1':'12','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 12
    */
   enum NotifyType {
     /**
      * File has been newly created
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     NOTIFY_ADDED = 0,
     /**
      * File has been modified.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     NOTIFY_MODIFIED = 1,
     /**
      * File has been deleted.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     NOTIFY_DELETED = 2,
     /**
      * File has been renamed or moved.
      *
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
-    NOTIFY_RENAMED = 3,
+    NOTIFY_RENAMED = 3
   }
 
-  /** 
+  /**
    * Defines the change data
-   * 
+   *
    * @interface ChangeData
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-   * @since arkts{ '1.1':'12','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 12
    */
   interface ChangeData {
     /**
      * The notify type of the change.
-     * 
+     *
      * @type {NotifyType}
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     type: NotifyType;
     /**
      * Indicates whether the changed uri is directory.
-     * 
+     *
      * @type {Array<boolean>}
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     isDirectory: Array<boolean>;
     /**
      * The changed uris.
-     * 
+     *
      * @type {Array<string>}
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
-     * @since arkts{ '1.1':'12','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     uris: Array<string>;
   }
-
   /**
-   * Optimize storage space
-   *
+   * Optimizes storage space by handling aging device-cloud files.
    * @permission ohos.permission.CLOUDFILE_SYNC
-   * @returns { Promise<void> } - Return Promise.
-   * @throws { BusinessError } 201 - Permission verification failed, usually the result returned by VerifyAccessToken.
-   * @throws { BusinessError } 202 - Permission verification failed, application which is not a system application uses system API.
-   * <br>2.Incorrect parameter types.
-   * @throws { BusinessError } 13600001 - IPC error.
-   * @throws { BusinessError } 13900042 - Unknown error.
+   * @returns { Promise<void> } Promise that returns no value.
+   * @throws { BusinessError } 201  Permission verification failed, usually the result returned by
+   * VerifyAccessToken.
+   * @throws { BusinessError } 202  Permission verification failed, application which is not a system
+   * application uses system API.
+   * @throws { BusinessError } 13600001  IPC error.
+   * @throws { BusinessError } 13900042  Internal Error.
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
    * @systemapi
-   * @since arkts{ '1.1':'17','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 17
    */
-  function optimizeStorage(): Promise<void>;
+  function optimizeStorage():Promise<void>;
 
   /**
    * Start optimize storage space task.
@@ -1180,16 +1391,14 @@ declare namespace cloudSync {
 
   /**
    * Stop optimize storage space task.
-   *
    * @permission ohos.permission.CLOUDFILE_SYNC
-   * @throws { BusinessError } 201 - Permission verification failed, usually the result returned by VerifyAccessToken.
-   * @throws { BusinessError } 202 - Permission verification failed, application which is not a system application uses system API.
-   * @throws { BusinessError } 13600001 - IPC error.
-   * @throws { BusinessError } 22400005 - Inner error.
+   * @throws { BusinessError } 201 Permission verification failed, usually the result returned by VerifyAccessToken.
+   * @throws { BusinessError } 202 Permission verification failed, application which is not a system application uses system API.
+   * @throws { BusinessError } 13600001 IPC Error
+   * @throws { BusinessError } 22400005 Inner Error
    * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
    * @systemapi
-   * @since arkts{ '1.1':'17','1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 17
    */
   function stopOptimizeSpace(): void;
 
@@ -1201,14 +1410,12 @@ declare namespace cloudSync {
    * @since arkts{ '1.1':'17','1.2':'20'}
    * @arkts 1.1&1.2
    */
-  export enum OptimizeState {
-
+  enum OptimizeState {
     /**
      * Indicates that the optimize space task in process now.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'17','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 17
      */
     RUNNING = 0,
 
@@ -1216,8 +1423,7 @@ declare namespace cloudSync {
      * Indicates that the optimize space task finished successfully.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'17','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 17
      */
     COMPLETED = 1,
 
@@ -1225,8 +1431,7 @@ declare namespace cloudSync {
      * Indicates that the optimize space task failed.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'17','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 17
      */
     FAILED = 2,
 
@@ -1234,8 +1439,7 @@ declare namespace cloudSync {
      * Indicates that the optimize space task stopped.
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'17','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 17
      */
     STOPPED = 3
   }
@@ -1249,15 +1453,13 @@ declare namespace cloudSync {
    * @arkts 1.1&1.2
    */
   interface OptimizeSpaceProgress {
-
     /**
      * The current optimize space task state.
      * @permission ohos.permission.CLOUDFILE_SYNC
      * @type { OptimizeState }
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'17','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 17
      */
     state: OptimizeState;
 
@@ -1267,8 +1469,7 @@ declare namespace cloudSync {
      * @type { number }
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'17','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 17
      */
     progress: number;
   }
@@ -1282,17 +1483,15 @@ declare namespace cloudSync {
    * @arkts 1.1&1.2
    */
   interface OptimizeSpaceParam {
-
     /**
      * The total size(Unit:byte) of clean space.
      * @permission ohos.permission.CLOUDFILE_SYNC
      * @type { number }
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'17','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 17
      */
-    totalSize: number;
+    totalSize:number;
 
     /**
      * Clean files that are not accessed agingDays(unit:day) ago.
@@ -1300,11 +1499,236 @@ declare namespace cloudSync {
      * @type { number }
      * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
      * @systemapi
-     * @since arkts{ '1.1':'17','1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 17
      */
     agingDays: number;
   }
+
+  /**
+   * Defines the HistoryVersion data structure.
+   * @typedef HistoryVersion
+   * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+   * @since 20
+   * @arkts 1.1&1.2
+   */
+  interface HistoryVersion {
+    /**
+     * The time when the content of this version file is edited.
+     * @type { number }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    editedTime: number;
+    /**
+     * The size of this history version file.
+     * @type { number }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    fileSize: number;
+    /**
+     * The version ID of this version.
+     * @type { string }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    versionId: string;
+    /**
+     * The original file name used to create this version.
+     * @type { string }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    originalFileName: string;
+    /**
+     * The Sha256 check value of this version file.
+     * @type { string }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    sha256: string;
+    /**
+     * Indicates whether this version automatically resolves the conflict.
+     * @type { boolean }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    autoResolved: boolean;
+  }
+
+  /**
+   * Defines the VersionDownloadProgress data structure.
+   * @typedef VersionDownloadProgress
+   * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+   * @since 20
+   * @arkts 1.1&1.2
+   */
+  interface VersionDownloadProgress {
+    /**
+     * The current download task state.
+     * @type { State }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    state: State;
+    /**
+     * The percentage of downloaded files.
+     * @type { number }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    progress: number;
+    /**
+     * The error type of download.
+     * @type { DownloadErrorType }
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    errType: DownloadErrorType;
+  }
+
+  /**
+   * FileVersion object.
+   * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+   * @since 20
+   * @arkts 1.1&1.2
+   */
+  class FileVersion {
+    /**
+     * A constructor used to create a FileVersion object.
+     *
+     * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+     *     <br>1.Failed to access the database or execute the SQL statement.
+     *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    constructor();
+    /**
+     * Get the specified number of most recent historical versions of the file specified by the URI.
+     *
+     * @param { string } uri - uri of file.
+     * @param { number } versionNumLimit - Maximum number of historical versions you want to obtained.
+     * @returns { Promise<Array<HistoryVersion>> } - Return the most recent history version list of the specified file.
+     * @throws { BusinessError } 13600001 - IPC error. Possible causes:
+     *     <br>1.IPC failed or timed out. 2.Failed to load the service.
+     * @throws { BusinessError } 13900002 - No such file or directory.
+     * @throws { BusinessError } 13900010 - Try again.
+     * @throws { BusinessError } 13900012 - Permission denied by the file system.
+     * @throws { BusinessError } 13900020 - Parameter error. Possible causes:
+     *     <br>1.Mandatory parameters are left unspecified; 2.Incorrect parameter types.
+     * @throws { BusinessError } 14000002 - Invalid URI.
+     * @throws { BusinessError } 22400002 - Network unavailable.
+     * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+     *     <br>1.Failed to access the database or execute the SQL statement.
+     *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    getHistoryVersionList(uri: string, versionNumLimit: number): Promise<Array<HistoryVersion>>;
+    /**
+     * Download the content of the specified history version to the specified temporary directory.
+     *
+     * @param { string } uri - Uri of file.
+     * @param { string } versionId - The version ID of the history version you want.
+     * @param { Callback<VersionDownloadProgress> } callback - callback function with a `VersionDownloadProgress` argument.
+     * @returns { Promise<string> } - Return the temporary directory to use for saving the content of the specified history version.
+     * @throws { BusinessError } 13600001 - IPC error. Possible causes:
+     *     <br>1.IPC failed or timed out. 2.Failed to load the service.
+     * @throws { BusinessError } 13900002 - No such file or directory.
+     * @throws { BusinessError } 13900010 - Try again.
+     * @throws { BusinessError } 13900012 - Permission denied by the file system.
+     * @throws { BusinessError } 13900020 - Parameter error. Possible causes:
+     *     <br>1.Mandatory parameters are left unspecified; 2.Incorrect parameter types.
+     * @throws { BusinessError } 14000002 - Invalid URI.
+     * @throws { BusinessError } 22400002 - Network unavailable.
+     * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+     *     <br>1.Failed to access the database or execute the SQL statement.
+     *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    downloadHistoryVersion(uri: string, versionId: string, callback: Callback<VersionDownloadProgress>): Promise<string>;
+    /**
+     * Replace the content of the specified file with the content of the specified history version.
+     *
+     * @param { string } originalUri - The uri of the file whose content you want to replace.
+     * @param { string } versionUri - The uri of the downloaded history version used to replace the original file.
+     * @returns { Promise<void> } - Return Promise.
+     * @throws { BusinessError } 13600001 - IPC error. Possible causes:
+     *     <br>1.IPC failed or timed out. 2.Failed to load the service.
+     * @throws { BusinessError } 13900002 - No such file or directory.
+     * @throws { BusinessError } 13900005 - I/O error.
+     * @throws { BusinessError } 13900008 - Bad file descriptor.
+     * @throws { BusinessError } 13900010 - Try again.
+     * @throws { BusinessError } 13900012 - Permission denied by the file system.
+     * @throws { BusinessError } 13900020 - Parameter error. Possible causes:
+     *     <br>1.Mandatory parameters are left unspecified; 2.Incorrect parameter types.
+     * @throws { BusinessError } 14000002 - Invalid URI. Possible causes: 1.originalUri invalid; 2.versionUri invalid.
+     * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+     *     <br>1.Failed to access the database or execute the SQL statement.
+     *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+     * @throws { BusinessError } 22400007 - The version file specified to replace the original file does not exist.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    replaceFileWithHistoryVersion(originalUri: string, versionUri: string): Promise<void>;
+    /**
+     * Check whether the current file content is in conflict with other versions.
+     *
+     * @param { string } uri - Uri of file.
+     * @returns { Promise<boolean> } - Return a Boolean value indicating whether the current file content is in conflict with other versions.
+     * @throws { BusinessError } 13600001 - IPC error. Possible causes:
+     *     <br>1.IPC failed or timed out. 2.Failed to load the service.
+     * @throws { BusinessError } 13900002 - No such file or directory.
+     * @throws { BusinessError } 13900010 - Try again.
+     * @throws { BusinessError } 13900012 - Permission denied by the file system.
+     * @throws { BusinessError } 13900020 - Parameter error. Possible causes:
+     *     <br>1.Mandatory parameters are left unspecified; 2.Incorrect parameter types.
+     * @throws { BusinessError } 14000002 - Invalid URI.
+     * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+     *     <br>1.Failed to access the database or execute the SQL statement.
+     *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    isFileConflict(uri: string): Promise<boolean>;
+    /**
+     * Clean the current file conflict flag after the conflict is resolved.
+     *
+     * @param { string } uri - Uri of file.
+     * @returns { Promise<void> } - Return Promise.
+     * @throws { BusinessError } 13600001 - IPC error. Possible causes:
+     *     <br>1.IPC failed or timed out. 2.Failed to load the service.
+     * @throws { BusinessError } 13900002 - No such file or directory.
+     * @throws { BusinessError } 13900010 - Try again.
+     * @throws { BusinessError } 13900012 - Permission denied by the file system.
+     * @throws { BusinessError } 13900020 - Parameter error. Possible causes:
+     *     <br>1.Mandatory parameters are left unspecified; 2.Incorrect parameter types.
+     * @throws { BusinessError } 14000002 - Invalid URI.
+     * @throws { BusinessError } 22400005 - Inner error. Possible causes:
+     *     <br>1.Failed to access the database or execute the SQL statement.
+     *     <br>2.System error, such as a null pointer, insufficient memory or a JS engine exception.
+     * @syscap SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+     * @since 20
+     * @arkts 1.1&1.2
+     */
+    clearFileConflict(uri: string): Promise<void>;
+  }
 }
 
-export default cloudSync;
+export default cloudSync;
\ No newline at end of file