diff --git a/api/@ohos.storageStatistics.d.ts b/api/@ohos.storageStatistics.d.ts
new file mode 100644
index 0000000000000000000000000000000000000000..7fb9e06aed970630a3bf192671313746a163eb4f
--- /dev/null
+++ b/api/@ohos.storageStatistics.d.ts
@@ -0,0 +1,56 @@
+/*
+* Copyright (C) 2021 Huawei Device Co., Ltd.
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import {AsyncCallback, Callback} from "./basic";
+
+/**
+ * Provides filesystem statistics APIs
+ *
+ * @since 8
+ * @syscap SystemCapability.FileManagement.StorageService.SpatialStatistics
+ */
+declare namespace storageStatistics {
+  /**
+   * Get the totalSize of volume.
+   *
+   * @since 8
+   */
+  function getTotalSizeOfVolume(volumeUuid: string, callback: AsyncCallback<number>): void;
+  function getTotalSizeOfVolume(volumeUuid: string): Promise<number>;
+  /**
+   * Get the free size Of volume.
+   * 
+   * @since 8
+   */
+  function getFreeSizeOfVolume(volumeUuid: string, callback: AsyncCallback<number>): void;
+  function getFreeSizeOfVolume(volumeUuid: string): Promise<number>;
+
+ /**
+   * Get the bundlestat 
+   * 
+   * @since 8
+   */
+
+ export interface BundleStats {
+  appSize: number;
+  cacheSize: number;
+  dataSize: number;
+}
+  function getBundleStats(volumeUuid: string, packageName: string,  callback: AsyncCallback<BundleStats>): void;
+  function getBundleStats(volumeUuid: string, packageName: string): Promise<BundleStats>;
+
+}
+
+export default storageStatistics;
diff --git a/api/@ohos.volumeManager.d.ts b/api/@ohos.volumeManager.d.ts
new file mode 100644
index 0000000000000000000000000000000000000000..0aa1f212770084f558eb0e7db56542c78ded51af
--- /dev/null
+++ b/api/@ohos.volumeManager.d.ts
@@ -0,0 +1,61 @@
+/*
+* Copyright (C) 2021 Huawei Device Co., Ltd.
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*     http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*/
+
+import {AsyncCallback, Callback} from "./basic";
+
+/**
+ * Provides volumemanager statistics APIs
+ *
+ * @since 8
+ * @syscap SystemCapability.FileManagement.StorageService.Volume
+ */
+declare namespace volumeManager {
+
+/**
+   * Get All Volumes
+   * 
+   * @since 8
+   */
+ export interface Volume {
+  id: number;
+  uuid: string;
+  description: string;
+  removeAble: boolean;
+  state: number;
+  path: string;
+}
+function getAllVolumes(callback: AsyncCallback<Array<Volume>>): void;
+function getAllVolumes(): Promise<Array<Volume>>;
+
+
+ /**
+   * Mount
+   * 
+   * @since 8
+   */
+function mount(volumeId: string, callback: AsyncCallback<boolean>): void;
+function mount(volumeId: string): Promise<boolean>;
+
+/**
+   * UnMount
+   * 
+   * @since 8
+   */
+function unmount(volumeId: string, callback: AsyncCallback<boolean>): void;
+function unmount(volumeId: string): Promise<boolean>;
+
+}
+
+export default volumeManager;