diff --git a/services/BUILD.gn b/services/BUILD.gn
index 263eb6dd3cabcebbd75de44c742252e8111fdd28..7cc0fe5f1165ba6817ad54b21838d7a910536257 100644
--- a/services/BUILD.gn
+++ b/services/BUILD.gn
@@ -17,6 +17,7 @@ FMS_BASE_DIR = "//foundation/filemanagement/user_file_service/services"
 
 group("fms") {
   deps = [
+    ":external_file_manager_hap",
     ":fms_server",
     ":fms_service.cfg",
   ]
@@ -91,3 +92,33 @@ ohos_shared_library("fms_server") {
     "samgr_standard:samgr_proxy",
   ]
 }
+
+ohos_hap("external_file_manager_hap") {
+  hap_profile = "file_extension_hap/entry/src/main/module.json"
+  deps = [
+    ":external_file_manager_js_assets",
+    ":external_file_manager_resources",
+  ]
+  certificate_profile = "signature/fileextension.p7b"
+  hap_name = "external_file_manager"
+  subsystem_name = "filemanagement"
+  part_name = "user_file_service"
+  module_install_dir = "app/com.ohos.UserFile.ExternalFileManager"
+}
+
+ohos_js_assets("external_file_manager_js_assets") {
+  hap_profile = "file_extension_hap/entry/src/main/module.json"
+  ets2abc = true
+  source_dir = "file_extension_hap/entry/src/main/ets"
+}
+
+ohos_app_scope("external_file_manager_app_profile") {
+  app_profile = "file_extension_hap/AppScope/app.json"
+  sources = [ "file_extension_hap/AppScope/resources" ]
+}
+
+ohos_resources("external_file_manager_resources") {
+  sources = [ "file_extension_hap/entry/src/main/resources" ]
+  deps = [ ":external_file_manager_app_profile" ]
+  hap_profile = "file_extension_hap/entry/src/main/module.json"
+}
diff --git a/services/file_extension_hap/AppScope/app.json b/services/file_extension_hap/AppScope/app.json
new file mode 100644
index 0000000000000000000000000000000000000000..9ed7e1acf9559e97986f90dcbbec33f3cfc6bd63
--- /dev/null
+++ b/services/file_extension_hap/AppScope/app.json
@@ -0,0 +1,11 @@
+{
+  "app": {
+    "bundleName": "com.ohos.UserFile.ExternalFileManager",
+    "versionCode": 100,
+    "versionName": "1.0.0",
+    "minAPIVersion": 9,
+    "targetAPIVersion": 9,
+    "icon": "$media:app_icon",
+    "label": "$string:app_name"
+  }
+}
diff --git a/services/file_extension_hap/AppScope/resources/base/element/string.json b/services/file_extension_hap/AppScope/resources/base/element/string.json
new file mode 100644
index 0000000000000000000000000000000000000000..bdb9ac3627d877c9908763446d259fc514e50c41
--- /dev/null
+++ b/services/file_extension_hap/AppScope/resources/base/element/string.json
@@ -0,0 +1,8 @@
+{
+  "string": [
+    {
+      "name": "app_name",
+      "value": "ExternalFileManager"
+    }
+  ]
+}
diff --git a/services/file_extension_hap/AppScope/resources/base/media/app_icon.png b/services/file_extension_hap/AppScope/resources/base/media/app_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..ce307a8827bd75456441ceb57d530e4c8d45d36c
Binary files /dev/null and b/services/file_extension_hap/AppScope/resources/base/media/app_icon.png differ
diff --git a/services/file_extension_hap/build-profile.json5 b/services/file_extension_hap/build-profile.json5
new file mode 100644
index 0000000000000000000000000000000000000000..8fac20813cb081694e75ab50d19a5faac524c66c
--- /dev/null
+++ b/services/file_extension_hap/build-profile.json5
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2022 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.
+ */
+{
+  "app": {
+    "compileSdkVersion": 9,
+    "compatibleSdkVersion": 9,
+    "products": [
+      {
+        "name": "default",
+        "signingConfig": "default",
+      }
+    ]
+  },
+  "modules": [
+    {
+      "name": "entry",
+      "srcPath": "./entry",
+      "targets": [
+        {
+          "name": "default",
+          "applyToProducts": [
+            "default"
+          ]
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/services/file_extension_hap/entry/build-profile.json5 b/services/file_extension_hap/entry/build-profile.json5
new file mode 100644
index 0000000000000000000000000000000000000000..d3089f7ba484c6385983234a1f147c161a5d9cdd
--- /dev/null
+++ b/services/file_extension_hap/entry/build-profile.json5
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2022 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.
+ */
+{
+  "apiType": 'stageMode',
+  "buildOption": {
+  },
+  "targets": [
+    {
+      "name": "default",
+    }
+  ]
+}
\ No newline at end of file
diff --git a/services/file_extension_hap/entry/hvigorfile.js b/services/file_extension_hap/entry/hvigorfile.js
new file mode 100644
index 0000000000000000000000000000000000000000..d7720ee6a7aad5c617d1fd2f6fc8c87067bfa32c
--- /dev/null
+++ b/services/file_extension_hap/entry/hvigorfile.js
@@ -0,0 +1,2 @@
+// Script for compiling build behavior. It is built in the build plug-in and cannot be modified currently.
+module.exports = require('@ohos/hvigor-ohos-plugin').hapTasks
diff --git a/services/file_extension_hap/entry/src/main/ets/Application/AbilityStage.ts b/services/file_extension_hap/entry/src/main/ets/Application/AbilityStage.ts
new file mode 100644
index 0000000000000000000000000000000000000000..c4851529e91e899ca93c1f43cbbd1259decafd1f
--- /dev/null
+++ b/services/file_extension_hap/entry/src/main/ets/Application/AbilityStage.ts
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2022 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 AbilityStage from "@ohos.application.AbilityStage"
+
+export default class MyAbilityStage extends AbilityStage {
+    onCreate() {
+    }
+}
\ No newline at end of file
diff --git a/services/file_extension_hap/entry/src/main/ets/FileExtensionAbility/FileExtensionAbility.ts b/services/file_extension_hap/entry/src/main/ets/FileExtensionAbility/FileExtensionAbility.ts
new file mode 100644
index 0000000000000000000000000000000000000000..667ec29ce0d338bfd75eff5244387f46744756a2
--- /dev/null
+++ b/services/file_extension_hap/entry/src/main/ets/FileExtensionAbility/FileExtensionAbility.ts
@@ -0,0 +1,259 @@
+/*
+ * Copyright (c) 2022 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 Extension from '@ohos.application.FileAccessExtensionAbility'
+import fileio from '@ohos.fileio'
+import { init, delVolumeInfo, getVolumeInfoList } from './VolumeManager'
+import { onReceiveEvent } from './Subcriber'
+import fileExtensionInfo from "@ohos.fileExtensionInfo"
+import appManager from '@ohos.application.appManager';
+
+const FLAG = fileExtensionInfo.FLAG;
+const BUNDLE_NAME = 'com.ohos.UserFile.ExternalFileManager';
+const DEFAULT_MODE = 0o666;
+const CREATE_FILE_FLAGS = 0o100;
+
+export default class FileExtAbility extends Extension {
+    onCreate(want) {
+        init();
+        onReceiveEvent(function (data) {
+            if (data.event == 'usual.event.data.VOLUME_MOUNTED') {
+                appManager.killProcessesByBundleName(BUNDLE_NAME);
+            } else {
+                delVolumeInfo(data.parameters.id);
+            }
+        });
+    }
+
+    getPath(uri) {
+        let sep = '://';
+        let arr = uri.split(sep);
+        if (arr.length < 2) {
+            return uri;
+        }
+        let path = uri.replace(arr[0] + sep, '');
+        if (arr[1].indexOf('/') > 0) {
+            path = path.replace(arr[1].split('/')[0], '');
+        }
+        return path;
+    }
+
+    genNewFileUri(uri, displayName) {
+        let arr = uri.split('/');
+        let newFileUri = uri;
+        if (arr.pop() == '') {
+            newFileUri += displayName;
+        } else {
+            newFileUri += '/' + displayName;
+        }
+        return newFileUri;
+    }
+
+    getFileName(uri) {
+        let arr = uri.split('/');
+        let name = arr.pop();
+        if (name == '') {
+            name = arr.pop();
+        }
+        return name;
+    }
+
+    renameUri(uri, displayName) {
+        let arr = uri.split('/');
+        let newFileUri = '';
+        if (arr.pop() == '') {
+            arr.pop();
+            arr.push(displayName)
+            arr.push('');
+        } else {
+            arr.push(displayName)
+        }
+        for (var index = 0; index < arr.length; index++) {
+            if (arr[index] == '') {
+                newFileUri += '/';
+            } else if (index == arr.length - 1) {
+                newFileUri += arr[index];
+            } else {
+                newFileUri += arr[index] + '/';
+            }
+        }
+        return newFileUri;
+    }
+
+    listDir(path, cb) {
+        try {
+            let stat = fileio.statSync(path);
+            if (stat.isDirectory()) {
+                let dir = fileio.opendirSync(path);
+                let hasNextFile = true;
+                while (hasNextFile) {
+                    try {
+                        let dirent = dir.readSync();
+                        this.listDir(path + '/' + dirent.name, cb);
+                    } catch (e) {
+                        hasNextFile = false;
+                        cb(path, true);
+                    }
+                }
+            } else {
+                cb(path, false);
+            }
+        } catch (e) {
+            cb(path, true);
+        }
+    }
+
+    openFile(sourceFileUri, flags) {
+        let fd = 0;
+        try {
+            let path = this.getPath(sourceFileUri);
+            fd = fileio.openSync(path, flags, DEFAULT_MODE);
+        } catch (e) {
+            fd = -1;
+        }
+
+        return fd;
+    }
+
+    closeFile(fd, uri) {
+        try {
+            fileio.closeSync(fd);
+            return true;
+        } catch (e) {
+            return false;
+        }
+    }
+
+    createFile(parentUri, displayName) {
+        try {
+            let newFileUri = this.genNewFileUri(parentUri, displayName);
+            let path = this.getPath(newFileUri);
+            fileio.openSync(path, CREATE_FILE_FLAGS, DEFAULT_MODE);
+            return newFileUri;
+        } catch (e) {
+            return '';
+        }
+    }
+
+    mkdir(parentUri, displayName) {
+        try {
+            let newFileUri = this.genNewFileUri(parentUri, displayName);
+            let path = this.getPath(newFileUri);
+            fileio.mkdirSync(path);
+            return newFileUri;
+        } catch (e) {
+            return '';
+        }
+    }
+
+    delete(selectFileUri) {
+        let path = this.getPath(selectFileUri);
+        let code = 0;
+        this.listDir(path, function (filePath, isDirectory) {
+            try {
+                if (isDirectory) {
+                    fileio.rmdirSync(filePath);
+                } else {
+                    fileio.unlinkSync(filePath);
+                }
+            } catch (e) {
+                code = -1;
+            }
+        });
+
+        return code;
+    }
+
+    move(sourceFileUri, targetParentUri) {
+        try {
+            let displayName = this.getFileName(sourceFileUri);
+            let newFileUri = this.genNewFileUri(targetParentUri, displayName);
+            let oldPath = this.getPath(sourceFileUri);
+            let newPath = this.getPath(newFileUri);
+            fileio.renameSync(oldPath, newPath);
+            return newFileUri;
+        } catch (e) {
+            return '';
+        }
+    }
+
+    rename(sourceFileUri, displayName) {
+        try {
+            let newFileUri = this.renameUri(sourceFileUri, displayName);
+            let oldPath = this.getPath(sourceFileUri);
+            let newPath = this.getPath(newFileUri);
+            fileio.renameSync(oldPath, newPath);
+            return newFileUri;
+        } catch (e) {
+            return '';
+        }
+    }
+
+    query(sourceFileUri) {
+        try {
+            let path = this.getPath(sourceFileUri);
+            let stat = fileio.statSync(path);
+            return {
+                uri: sourceFileUri,
+                fileName: this.getFileName(sourceFileUri),
+                mode: '' + stat.mode,
+                size: stat.size,
+                mtime: stat.mtime,
+                mimeType: '',
+            };
+        } catch (e) {
+            return null;
+        }
+    }
+
+    listFile(sourceFileUri) {
+        let infos = [];
+        try {
+            let path = this.getPath(sourceFileUri);
+            let dir = fileio.opendirSync(path);
+            let hasNextFile = true;
+            while (hasNextFile) {
+                try {
+                    let dirent = dir.readSync();
+                    let stat = fileio.statSync(path + '/' + dirent.name);
+                    infos.push({
+                        uri: this.genNewFileUri(sourceFileUri, dirent.name),
+                        fileName: dirent.name,
+                        mode: '' + stat.mode,
+                        size: stat.size,
+                        mtime: stat.mtime,
+                        mimeType: '',
+                    });
+                } catch (e) {
+                    hasNextFile = false;
+                }
+            }
+        } catch (e) {
+            infos = [];
+        }
+
+        return infos;
+    }
+
+    getRoots() {
+        let roots = getVolumeInfoList().concat({
+            uri: 'fileAccess:///data/storage/el1/bundle/storage_daemon',
+            displayName: 'storage_daemon',
+            deviceId: '',
+            flags: FLAG.SUPPORTS_WRITE | FLAG.SUPPORTS_DELETE | FLAG.SUPPORTS_RENAME | FLAG.SUPPORTS_COPY |
+                FLAG.SUPPORTS_MOVE | FLAG.SUPPORTS_REMOVE | FLAG.DIR_SUPPORTS_CREATE | FLAG.DIR_PREFERS_LAST_MODIFIED,
+        });
+        return roots;
+    }
+};
\ No newline at end of file
diff --git a/services/file_extension_hap/entry/src/main/ets/FileExtensionAbility/Subcriber.ts b/services/file_extension_hap/entry/src/main/ets/FileExtensionAbility/Subcriber.ts
new file mode 100644
index 0000000000000000000000000000000000000000..a2e8acec2c7f994d5fc3b806ba862065901f984d
--- /dev/null
+++ b/services/file_extension_hap/entry/src/main/ets/FileExtensionAbility/Subcriber.ts
@@ -0,0 +1,32 @@
+/*
+* Copyright (c) 2022 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 CommonEvent from '@ohos.commonevent'
+async function onReceiveEvent(callBack) {
+    var subscribeInfo = {
+        events: [
+            "usual.event.data.VOLUME_REMOVED",
+            "usual.event.data.VOLUME_UNMOUNTED",
+            "usual.event.data.VOLUME_MOUNTED",
+            "usual.event.data.VOLUME_BAD_REMOVAL",
+            "usual.event.data.VOLUME_EJECT"
+        ]
+    };
+    let subscriber = await CommonEvent.createSubscriber(subscribeInfo);
+    CommonEvent.subscribe(subscriber, function (err, data) {
+        callBack(data)
+    })
+}
+
+export { onReceiveEvent }
\ No newline at end of file
diff --git a/services/file_extension_hap/entry/src/main/ets/FileExtensionAbility/VolumeManager.ts b/services/file_extension_hap/entry/src/main/ets/FileExtensionAbility/VolumeManager.ts
new file mode 100644
index 0000000000000000000000000000000000000000..63c5bf912c828ccb245e84b466ae52a82840c959
--- /dev/null
+++ b/services/file_extension_hap/entry/src/main/ets/FileExtensionAbility/VolumeManager.ts
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2022 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 volumeManager from '@ohos.volumeManager'
+import fileExtensionInfo from "@ohos.fileExtensionInfo"
+if (!globalThis.volumeInfoList) {
+    globalThis.volumeInfoList = [];
+}
+
+const FLAG = fileExtensionInfo.FLAG;
+
+function init() {
+    volumeManager.getAllVolumes().then((volumes) => {
+        let flags = FLAG.SUPPORTS_WRITE | FLAG.SUPPORTS_DELETE | FLAG.SUPPORTS_RENAME | FLAG.SUPPORTS_COPY |
+            FLAG.SUPPORTS_MOVE | FLAG.SUPPORTS_REMOVE | FLAG.DIR_SUPPORTS_CREATE | FLAG.DIR_PREFERS_LAST_MODIFIED;
+        for (let i = 0; i < volumes.length; i++) {
+            let volume = volumes[i];
+            let volumeInfo = {
+                'volumeId': volume.id,
+                'fsUuid': volume.uuid,
+                'path': volume.path,
+                'uri': path2uri('', volume.path),
+                'displayName': volume.id,
+                'deviceId': '',
+                'flags': flags,
+                'type': 'SD'
+            }
+            globalThis.volumeInfoList.push(volumeInfo);
+        }
+    });
+}
+
+function addVolumeInfo(volumeInfo) {
+    globalThis.volumeInfoList.push(volumeInfo);
+}
+
+function path2uri(id, path) {
+    return `fileAccess://${id}${path}`;
+}
+
+function delVolumeInfo(volumeId) {
+    globalThis.volumeInfoList = globalThis.volumeInfoList.filter((volume) => volume.volumeId !== volumeId);
+}
+
+function getVolumeInfoList() {
+    return globalThis.volumeInfoList;
+}
+
+export { init, addVolumeInfo, delVolumeInfo, getVolumeInfoList, path2uri }
\ No newline at end of file
diff --git a/services/file_extension_hap/entry/src/main/module.json b/services/file_extension_hap/entry/src/main/module.json
new file mode 100644
index 0000000000000000000000000000000000000000..3908c63b3421cbcc5c56f8a048201758823e3c5b
--- /dev/null
+++ b/services/file_extension_hap/entry/src/main/module.json
@@ -0,0 +1,33 @@
+{
+  "module": {
+    "name": "entry",
+    "type": "entry",
+    "srcEntrance": "./ets/Application/AbilityStage.ts",
+    "mainElement": "FileExtensionAbility",
+    "deviceTypes": [
+      "phone",
+      "tablet"
+    ],
+    "deliveryWithInstall": true,
+    "installationFree": false,
+    "pages": "$profile:main_pages",
+    "uiSyntax": "ets",
+    "abilities": [],
+    "extensionAbilities": [
+      {
+        "srcEntrance": "./ets/FileExtensionAbility/FileExtensionAbility.ts",
+        "name": "FileExtensionAbility",
+        "type": "fileAccess",
+        "visible": true
+      }
+    ],
+    "requestPermissions": [
+      {
+        "name": "ohos.permission.CLEAN_BACKGROUND_PROCESSES"
+      },
+      {
+        "name": "ohos.permission.STORAGE_MANAGER"
+      }
+    ]
+  }
+}
\ No newline at end of file
diff --git a/services/file_extension_hap/entry/src/main/resources/base/element/string.json b/services/file_extension_hap/entry/src/main/resources/base/element/string.json
new file mode 100644
index 0000000000000000000000000000000000000000..c4e8611bfbd8bb3177924f05e7e22a7ca3dcf5dd
--- /dev/null
+++ b/services/file_extension_hap/entry/src/main/resources/base/element/string.json
@@ -0,0 +1,12 @@
+{
+  "string": [
+    {
+      "name": "entry_desc",
+      "value": "description"
+    },
+    {
+      "name": "description_serviceability",
+      "value": "description_serviceability"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/services/file_extension_hap/entry/src/main/resources/base/media/icon.png b/services/file_extension_hap/entry/src/main/resources/base/media/icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..ce307a8827bd75456441ceb57d530e4c8d45d36c
Binary files /dev/null and b/services/file_extension_hap/entry/src/main/resources/base/media/icon.png differ
diff --git a/services/file_extension_hap/entry/src/main/resources/base/profile/main_pages.json b/services/file_extension_hap/entry/src/main/resources/base/profile/main_pages.json
new file mode 100644
index 0000000000000000000000000000000000000000..b12d9e9faa33835d362c73333632d70b7c61328a
--- /dev/null
+++ b/services/file_extension_hap/entry/src/main/resources/base/profile/main_pages.json
@@ -0,0 +1,3 @@
+{
+  "src": []
+}
\ No newline at end of file
diff --git a/services/file_extension_hap/hvigorfile.js b/services/file_extension_hap/hvigorfile.js
new file mode 100644
index 0000000000000000000000000000000000000000..5f2735e3deeaf655828407544bbed9365c258278
--- /dev/null
+++ b/services/file_extension_hap/hvigorfile.js
@@ -0,0 +1,2 @@
+// Script for compiling build behavior. It is built in the build plug-in and cannot be modified currently.
+module.exports = require('@ohos/hvigor-ohos-plugin').appTasks
\ No newline at end of file
diff --git a/services/signature/fileextension.p7b b/services/signature/fileextension.p7b
new file mode 100644
index 0000000000000000000000000000000000000000..66b4457a8a81fb8d3356cf46d67226c850944858
Binary files /dev/null and b/services/signature/fileextension.p7b differ