update docs

Signed-off-by: NAnnie_wang <annie.wangli@huawei.com>

en/application-dev/reference/apis/Readme-EN.md

@@ -259,6 +259,7 @@
 
 - File Management
   - [@ohos.file.backup (Backup and Restoration)](js-apis-file-backup.md)
+  - [@ohos.file.cloudSync (Device-Cloud Synchronization)](js-apis-file-cloudsync.md)
   - [@ohos.file.cloudSyncManager (Device-Cloud Synchronization Management)](js-apis-file-cloudsyncmanager.md)
   - [@ohos.file.environment (Directory Environment Capability)](js-apis-file-environment.md)
   - [@ohos.file.fileAccess (User File Access and Management)](js-apis-fileAccess.md)

en/application-dev/reference/apis/js-apis-file-cloudsync.md

+# @ohos.file.cloudSync (Device-Cloud Synchronization)
+
+The **cloudSync** module provides the device-cloud synchronization capabilities for applications. You can use the APIs to start or stop device-cloud synchronization and start or stop the download of images.
+
+> **NOTE**
+>
+> - The initial APIs of this module are supported since API version 10. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+> - The APIs of this module are system APIs and cannot be called by third-party applications.
+
+## Modules to Import
+
+```js
+import cloudSync from '@ohos.file.cloudSync'
+```
+
+## SyncState
+
+Enumerates the device-cloud synchronization states.
+
+> **NOTE**
+>
+> If a synchronization process event listener is registered for an application, a callback will be invoked to notify the application when any of the following states is changed.
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+| Name|  Value|  Description|
+| ----- |  ---- |  ---- |
+| UPLOADING |  0 | Uploading.|
+| UPLOAD_FAILED |  1 | Upload failed.|
+| DOWNLOADING |  2 | Downloading.|
+| DOWNLOAD_FAILED |  3 | Download failed.|
+| COMPLETED |  4 | Synchronization completed.|
+| STOPPED |  5 | Synchronization stopped.|
+
+## ErrorType
+
+Enumerates the device-cloud synchronization error types.
+
+- Currently, **NETWORK_UNAVAILABLE** is returned only when both the mobile network and Wi-Fi are unavailable during synchronization. If either network is available, synchronization can be performed normally.
+- During the synchronization process, if the battery level is lower than 15% in non-charging scenarios, **BATTERY_LEVEL_LOW** will be return when the current upload is complete; if the battery level is lower than 10% in non-charging scenarios, **BATTERY_LEVEL_WARNING** will be returned when the current upload is complete.
+- When synchronization is triggered, if the battery level is lower than 15% in non-charging scenarios, synchronization is not allowed and an error code will be returned by **start()**.
+- If the cloud space is insufficient when a file is uploaded, the upload will fail. 
+- If the local space is insufficient when a file is downloaded, the download will fail. After the local space is released, the file will be downloaded again when synchronization starts.
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+| Name|  Value|  Description|
+| ----- |  ---- |  ---- |
+| NO_ERROR |  0 | No error.|
+| NETWORK_UNAVAILABLE |  1 | No network is available.|
+| WIFI_UNAVAILABLE |  2 | Wi-Fi is unavailable.|
+| BATTERY_LEVEL_LOW |  3 | The battery level is lower than 15%.|
+| BATTERY_LEVEL_WARNING |  4 | The battery level is lower than 10%.|
+| CLOUD_STORAGE_FULL |  5 | The cloud space is insufficient.|
+| LOCAL_STORAGE_FULL |  6 | The local space is insufficient.|
+
+## SyncProgress
+
+Defines the device-cloud synchronization process.
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| state | [SyncState](#syncstate) | Yes  | Device-cloud synchronization state.|
+| error | [ErrorType](#errortype) | Yes  | Synchronization error type.|
+
+## GallerySync
+
+Provides APIs to implement device-cloud synchronization of media resources of the Gallery. Before using the APIs of **GallerySync**, you need to create a **GallerySync** instance.
+
+### constructor
+
+constructor()
+
+A constructor used to create a **GallerySync** instance.
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Example**
+
+  ```js
+  let gallerySync = new cloudSync.GallerySync()
+  ```
+
+### on
+
+on(evt: 'progress', callback: (pg: SyncProgress) => void): void
+
+Subscribes to the synchronization process event.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| evt | string | Yes  | Type of the event to subscribe to. The value is **progress**, which indicates the synchronization process event.|
+| callback | (pg: SyncProgress) => void | Yes  | Callback invoked to return the result. The input parameter is [SyncProgress](#syncprogress), and the return value is **void**.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+| 13600001  | IPC error. |
+
+**Example**
+
+  ```js
+  let gallerySync = new cloudSync.GallerySync();
+
+  gallerySync.on('progress', (pg: SyncProgress) => {
+    console.info("syncState: " + pg.syncState);
+  });
+  ```
+
+### off
+
+off(evt: 'progress'): void
+
+Unsubscribes from the synchronization process event.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| evt | string | Yes  | Type of the event to unsubscribe from. The value is **progress**, which indicates the synchronization process event.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+| 13600001  | IPC error. |
+
+**Example**
+
+  ```js
+  let gallerySync = new cloudSync.GallerySync();
+
+  gallerySync.on('progress', (pg: SyncProgress) => {
+      console.info("syncState: " + pg.syncState);
+  });
+
+  gallerySync.off('progress');
+  ```
+
+### start
+
+start(): Promise<void>
+
+Starts device-cloud synchronization. This API uses a promise to return the result.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Return value**
+
+| Type                 | Description            |
+| --------------------- | ---------------- |
+| Promise<void> | Promise used to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+| 22400001 | Cloud status not ready. |
+| 22400002 | Network unavailable. |
+| 22400003  | Battery level warning. |
+
+**Example**
+
+  ```js
+  let gallerySync = new cloudSync.GallerySync();
+
+  gallerySync.on('progress', (pg: SyncProgress) => {
+	  console.info("syncState: " + pg.syncState);
+  });
+
+  gallerySync.start().then(function() {
+	  console.info("start sync successfully");
+  }).catch(function(err) {
+	  console.info("start sync failed with error message: " + err.message + ", error code: " + err.code);
+  });
+  ```
+
+### start
+
+start(callback: AsyncCallback<void>): void
+
+Starts device-cloud synchronization. This API uses an asynchronous callback to return the result.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| callback | AsyncCallback<void> | Yes  | Callback invoked to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+| 22400001 | Cloud status not ready. |
+| 22400002 | Network unavailable. |
+| 22400003  | Battery level warning. |
+
+**Example**
+
+  ```js
+  let gallerySync = new cloudSync.GallerySync();
+
+  gallerySync.start((err) => {
+    if (err) {
+      console.info("start sync failed with error message: " + err.message + ", error code: " + err.code);
+    } else {
+      console.info("start sync successfully");
+    }
+  });
+  ```
+
+### stop
+
+stop(): Promise<void>
+
+Stops device-cloud synchronization. This API uses a promise to return the result.
+
+> **NOTE**
+>
+> Calling **stop** will stop the synchronization process. To resume the synchronization, call [start](#start).
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Return value**
+
+| Type                 | Description            |
+| --------------------- | ---------------- |
+| Promise<void> | Promise used to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+
+**Example**
+
+  ```js
+  let gallerySync = new cloudSync.GallerySync();
+
+  gallerySync.stop().then(function() {
+	  console.info("stop sync successfully");
+  }).catch(function(err) {
+	  console.info("stop sync failed with error message: " + err.message + ", error code: " + err.code);
+  });
+  ```
+
+### stop
+
+stop(callback: AsyncCallback<void>): void
+
+Stops device-cloud synchronization. This API uses an asynchronous callback to return the result.
+
+> **NOTE**
+>
+> Calling **stop** will stop the synchronization process. To resume the synchronization, call [start](#start-1).
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| callback | AsyncCallback<void> | Yes  | Callback invoked to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+
+**Example**
+
+  ```js
+  let gallerySync = new cloudSync.GallerySync();
+
+  gallerySync.stop((err) => {
+    if (err) {
+      console.info("stop sync failed with error message: " + err.message + ", error code: " + err.code);
+    } else {
+      console.info("stop sync successfully");
+    }
+  });
+  ```
+
+## State
+
+Enumerates the download states of a cloud file.
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+| Name|  Value|  Description|
+| ----- |  ---- |  ---- |
+| RUNNING |  0 | The cloud file is being downloaded.|
+| COMPLETED |  1 | The cloud file download is complete.|
+| FAILED |  2 | The cloud file download failed.|
+| STOPPED |  3 | The cloud file download is stopped.|
+
+## DownloadProgress
+
+Defines the download process of a cloud file.
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| state | [State](#state) | Yes  | File download state.|
+| processed | number | Yes  | Size of data downloaded.|
+| size | number | Yes  | Current size of the file.|
+| uri | string | Yes  | URI of the file.|
+
+## Download
+
+Provides APIs for downloading the image files in Gallery. Before using the APIs of **Download**, you need to create a **Download** instance.
+
+### constructor
+
+constructor()
+
+A constructor used to create a **Download** instance.
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Example**
+
+  ```js
+  let download = new cloudSync.Download()
+  ```
+
+### on
+
+on(evt: 'progress', callback: (pg: DownloadProgress) => void): void
+
+Subscribes to the cloud file download event.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| evt | string | Yes  | Type of the event to subscribe to. The value is **progress**, which indicates the download process event.|
+| callback | (pg: DownloadProgress) => void | Yes  | Callback invoked to return the result. The input parameter is [DownloadProgress](#downloadprogress), and the return value is **void**.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+| 13600001  | IPC error. |
+
+**Example**
+
+  ```js
+  let download = new cloudSync.Download();
+
+  download.on('progress', (pg: DownloadProgress) => {
+    console.info("download state: " + pg.state);
+  });
+  ```
+
+### off
+
+off(evt: 'progress'): void
+
+Unsubscribes from the cloud file download event.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| evt | string | Yes  | Type of the event to unsubscribe from. The value is **progress**, which indicates the download process event.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+| 13600001  | IPC error. |
+
+**Example**
+
+  ```js
+  let download = new cloudSync.Download();
+
+  download.on('progress', (pg: DownloadProgress) => {
+      console.info("download state:" + pg.state);
+  });
+
+  download.off('progress');
+  ```
+
+### start
+
+start(uri: string): Promise<void>
+
+Starts to download a cloud file. This API uses a promise to return the result.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| uri | string | Yes  | URI of the file to download.|
+
+**Return value**
+
+| Type                 | Description            |
+| --------------------- | ---------------- |
+| Promise<void> | Promise used to return the result.|
+
+**Example**
+
+  ```js
+  let download = new cloudSync.Download();
+
+  download.on('progress', (pg: DownloadProgress) => {
+	  console.info("download state:" + pg.state);
+  });
+
+  download.start().then(function() {
+	  console.info("start download successfully");
+  }).catch(function(err) {
+	  console.info("start download failed with error message: " + err.message + ", error code: " + err.code);
+  });
+  ```
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+| 13900002 | No such file or directory. |
+| 13900025 | No space left on device. |
+
+### start
+
+start(uri: string, callback: AsyncCallback<void>): void
+
+Starts to download a cloud file. This API uses an asynchronous callback to return the result.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| uri | string | Yes  | URI of the file to download.|
+| callback | AsyncCallback<void> | Yes  | Callback invoked to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+| 13900002 | No such file or directory. |
+| 13900025 | No space left on device. |
+
+**Example**
+
+  ```js
+  let download = new cloudSync.Download();
+
+  download.start((err) => {
+    if (err) {
+      console.info("start download failed with error message: " + err.message + ", error code: " + err.code);
+    } else {
+      console.info("start download successfully");
+    }
+  });
+  ```
+
+### stop
+
+stop(uri: string): Promise<void>
+
+Stops downloading a cloud file. This API uses a promise to return the result.
+
+> **NOTE**
+>
+> Calling **stop** will terminate the download of the current file and clear the cached file. You can use [start](#start-3) to start the download again.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| uri | string | Yes  | URI of the file to download.|
+
+**Return value**
+
+| Type                 | Description            |
+| --------------------- | ---------------- |
+| Promise<void> | Promise used to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+
+**Example**
+
+  ```js
+  let download = new cloudSync.Download();
+
+  download.stop().then(function() {
+	  console.info("stop download successfully");
+  }).catch(function(err) {
+	  console.info("stop download failed with error message: " + err.message + ", error code: " + err.code);
+  });
+  ```
+
+### stop
+
+stop(uri: string, callback: AsyncCallback<void>): void
+
+Stops downloading a cloud file. This API uses an asynchronous callback to return the result.
+
+> **NOTE**
+>
+> Calling **stop** will terminate the download of the current file and clear the cached file. You can use [start](#start-4) to start the download again.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSync.Core
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| uri | string | Yes  | URI of the file to download.|
+| callback | AsyncCallback<void> | Yes  | Callback invoked to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+
+**Example**
+
+  ```js
+  let download = new cloudSync.Download();
+
+  download.stop((err) => {
+    if (err) {
+      console.info("stop download failed with error message: " + err.message + ", error code: " + err.code);
+    } else {
+      console.info("stop download successfully");
+    }
+  });
+  ```

en/application-dev/reference/apis/js-apis-file-cloudsyncmanager.md

 # @ohos.file.cloudSyncManager (Device-Cloud Synchronization Management)
 
-The **cloudSyncManager** module provides APIs for changing the cloud and device service status and notifying the data changes. 
+The **cloudSyncManager** module provides APIs for managing device-cloud synergy for applications. You can use the APIs to enable or disable device-cloud synergy, change the device-cloud synchronization switch for an application, notify cloud data changes, and clear or retain cloud files when a cloud account exits.
 
 > **NOTE**
+>
 > - The initial APIs of this module are supported since API version 10. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 > - The APIs of this module are system APIs and cannot be called by third-party applications.
 
 ## Modules to Import
 
 ```js
-import cloudSyncManager from '@ohos.file.cloudSyncManager';
+import cloudSyncManager from '@ohos.file.cloudSyncManager'
 ```
 
 ## cloudSyncManager.changeAppCloudSwitch
 
-changeAppCloudSwitch(accountId: string, bundleName: string, status: boolean): Promise<void>;
+changeAppCloudSwitch(accountId: string, bundleName: string, status: boolean): Promise<void>
 
 Changes the device-cloud file synchronization switch for an application. This API uses a promise to return the result.
 
@@ -37,6 +38,7 @@ Changes the device-cloud file synchronization switch for an application. This AP
 **Error codes**
 
 For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
 | ID                    | Error Message       |
 | ---------------------------- | ---------- |
 | 201 | Permission verification failed. |
@@ -57,7 +59,7 @@ For details about the error codes, see [File Management Error Codes](../errorcod
 
 ## cloudSyncManager.changeAppCloudSwitch
 
-changeAppCloudSwitch(accountId: string, bundleName: string, status: boolean, callback: AsyncCallback<void>): void;
+changeAppCloudSwitch(accountId: string, bundleName: string, status: boolean, callback: AsyncCallback<void>): void
 
 Changes the device-cloud file synchronization switch for an application. This API uses an asynchronous callback to return the result.
 
@@ -75,6 +77,7 @@ Changes the device-cloud file synchronization switch for an application. This AP
 **Error codes**
 
 For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
 | ID                    | Error Message       |
 | ---------------------------- | ---------- |
 | 201 | Permission verification failed. |
@@ -97,7 +100,7 @@ For details about the error codes, see [File Management Error Codes](../errorcod
 
 ## cloudSyncManager.notifyDataChange
 
-notifyDataChange(accountId: string, bundleName: string): Promise<void>;
+notifyDataChange(accountId: string, bundleName: string): Promise<void>
 
 Notifies the cloud and device services of the application data change in the cloud. This API uses a promise to return the result.
 
@@ -119,6 +122,7 @@ Notifies the cloud and device services of the application data change in the clo
 **Error codes**
 
 For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
 | ID                    | Error Message       |
 | ---------------------------- | ---------- |
 | 201 | Permission verification failed. |
@@ -139,7 +143,7 @@ For details about the error codes, see [File Management Error Codes](../errorcod
 
 ## cloudSyncManager.notifyDataChange
 
-notifyDataChange(accountId: string, bundleName: string, callback: AsyncCallback<void>): void;
+notifyDataChange(accountId: string, bundleName: string, callback: AsyncCallback<void>): void
 
 Notifies the cloud and device services of the application data change in the cloud. This API uses a promise to return the result.
 
@@ -156,6 +160,7 @@ Notifies the cloud and device services of the application data change in the clo
 **Error codes**
 
 For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
 | ID                    | Error Message       |
 | ---------------------------- | ---------- |
 | 201 | Permission verification failed. |
@@ -175,3 +180,275 @@ For details about the error codes, see [File Management Error Codes](../errorcod
     }
   });
   ```
+
+## cloudSyncManager.enableCloud
+
+enableCloud(accountId: string, switches: { [bundleName: string]: boolean }): Promise<void>
+
+Enables device-cloud synergy. This API uses a promise to return the result.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC_MANAGER
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSyncManager
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| accountId | string | Yes  | Account ID.|
+| switches | object | Yes  | Whether to enable the device-cloud synergy feature. **bundleName** indicates the application bundle name. The switch status is a Boolean value.|
+
+**Return value**
+
+| Type                 | Description            |
+| --------------------- | ---------------- |
+| Promise<void> | Promise used to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+
+**Example**
+
+  ```js
+  let accountId = "testAccount";
+  let switches = {"com.example.bundleName1": true, "com.example.bundleName2": false};
+  cloudSyncManager.enableCloud(accountId, switches).then(function() {
+      console.info("enableCloud successfully");
+  }).catch(function(err) {
+      console.info("enableCloud failed with error message: " + err.message + ", error code: " + err.code);
+  });
+  ```
+
+## cloudSyncManager.enableCloud
+
+enableCloud(accountId: string, switches: { [bundleName: string]: boolean }, callback: AsyncCallback<void>): void
+
+Enables device-cloud synergy. This API uses an asynchronous callback to return the result.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC_MANAGER
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSyncManager
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| accountId | string | Yes  | Account ID.|
+| switches | object | Yes  | Whether to enable the device-cloud synergy feature. **bundleName** indicates the application bundle name. The switch status is a Boolean value.|
+| callback | AsyncCallback<void> | Yes  | Callback invoked to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+
+**Example**
+
+  ```js
+  let accountId = "testAccount";
+  let switches = {"com.example.bundleName1": true, "com.example.bundleName2": false};
+  cloudSyncManager.enableCloud(accountId, switches, (err) => {
+    if (err) {
+      console.info("enableCloud failed with error message: " + err.message + ", error code: " + err.code);
+    } else {
+      console.info("enableCloud successfully");
+    }
+  });
+  ```
+
+## cloudSyncManager.disableCloud
+
+disableCloud(accountId: string): Promise<void>
+
+Disables device-cloud synergy. This API uses a promise to return the result.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC_MANAGER
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSyncManager
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| accountId | string | Yes  | Account ID.|
+
+**Return value**
+
+| Type                 | Description            |
+| --------------------- | ---------------- |
+| Promise<void> | Promise used to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+
+**Example**
+
+  ```js
+  let accountId = "testAccount";
+  cloudSyncManager.disableCloud(accountId).then(function() {
+      console.info("disableCloud successfully");
+  }).catch(function(err) {
+      console.info("disableCloud failed with error message: " + err.message + ", error code: " + err.code);
+  });
+  ```
+
+## cloudSyncManager.disableCloud
+
+disableCloud(accountId: string, callback: AsyncCallback<void>): void
+
+Disables device-cloud synergy. This API uses an asynchronous callback to return the result.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC_MANAGER
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSyncManager
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| accountId | string | Yes  | Account ID.|
+| callback | AsyncCallback<void> | Yes  | Callback invoked to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+
+**Example**
+
+  ```js
+  let accountId = "testAccount";
+  cloudSyncManager.disableCloud(accountId, (err) => {
+    if (err) {
+      console.info("disableCloud failed with error message: " + err.message + ", error code: " + err.code);
+    } else {
+      console.info("disableCloud successfully");
+    }
+  });
+  ```
+
+## Action
+
+Enumerates the actions that can be taken to clear local cloud data.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC_MANAGER
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSyncManager
+
+| Name|  Value|  Description|
+| ----- |  ---- |  ---- |
+| RETAIN_DATA |  0 |  Clear the cloud identifier but retain the files cached locally.|
+| CLEAR_DATA |  1 |  Clear the cloud identifier and the files cached locally.|
+
+## cloudSyncManager.clean
+
+clean(accountId: string, appActions: { [bundleName: string]: Action }): Promise<void>
+
+Clears the cloud data locally. This API uses a promise to return the result.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC_MANAGER
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSyncManager
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| accountId | string | Yes  | Account ID.|
+| appActions | object | Yes  | Action to take. **bundleName** indicates the application bundle to clear, and [Action](#action) indicates the action to take.|
+
+**Return value**
+
+| Type                 | Description            |
+| --------------------- | ---------------- |
+| Promise<void> | Promise used to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+
+**Example**
+
+  ```js
+  let accountId = "testAccount";
+  let appActions = {"com.example.bundleName1": cloudSyncManager.Action.RETAIN_DATA,
+                    "com.example.bundleName2": cloudSyncManager.Action.CLEAR_DATA};
+  cloudSyncManager.clean(accountId, appActions).then(function() {
+      console.info("clean successfully");
+  }).catch(function(err) {
+      console.info("clean failed with error message: " + err.message + ", error code: " + err.code);
+  });
+  ```
+
+## cloudSyncManager.clean
+
+clean(accountId: string, appActions: { [bundleName: string]: Action }, callback: AsyncCallback<void>): void
+
+Clears the cloud data locally. This API uses an asynchronous callback to return the result.
+
+**Required permissions**: ohos.permission.CLOUDFILE_SYNC_MANAGER
+
+**System capability**: SystemCapability.FileManagement.DistributedFileService.CloudSyncManager
+
+**Parameters**
+
+| Name    | Type  | Mandatory| Description|
+| ---------- | ------ | ---- | ---- |
+| accountId | string | Yes  | Account ID.|
+| appActions | object | Yes  | Action to take. **bundleName** indicates the application bundle to clear, and [Action](#action) indicates the action to take.|
+| callback | AsyncCallback<void> | Yes  | Callback invoked to return the result.|
+
+**Error codes**
+
+For details about the error codes, see [File Management Error Codes](../errorcodes/errorcode-filemanagement.md).
+
+| ID                    | Error Message       |
+| ---------------------------- | ---------- |
+| 201 | Permission verification failed. |
+| 202 | The caller is not a system application. |
+| 401 | The input parameter is invalid. |
+
+**Example**
+
+  ```js
+  let accountId = "testAccount";
+  let appActions = {"com.example.bundleName1": cloudSyncManager.Action.RETAIN_DATA,
+                    "com.example.bundleName2": cloudSyncManager.Action.CLEAR_DATA};
+  cloudSyncManager.clean(accountId, appActions, (err) => {
+    if (err) {
+      console.info("clean failed with error message: " + err.message + ", error code: " + err.code);
+    } else {
+      console.info("clean successfully");
+    }
+  });
+  ```

en/application-dev/reference/errorcodes/errorcode-filemanagement.md

@@ -10,6 +10,7 @@ The error codes of the file management subsystem include the following:
 - [User Data Management Error Codes](#user-data-management-error-code)
 - [User File Access Error Codes](#user-file-access-error-codes)
 - [Space Statistics Error Codes](#space-statistics-error-codes)
+- [Device-Cloud Synchronization Error Codes](#device-cloud-synchronization-error-codes)
 
 ## Basic File IO Error Codes
 
@@ -155,7 +156,7 @@ The resources are blocked.
 
 **Solution**
 
-Request resources.
+Request the resource again.
 
 ### 13900011 Memory Overflow
 
@@ -273,7 +274,7 @@ The specified directory is invalid.
 
 **Solution**
 
-Check that the directory is correct.
+Check that the specified directory is correct.
 
 ### 13900019 The Specified Object Is a Directory
 
@@ -297,7 +298,7 @@ Invalid argument
 
 **Possible Causes**
 
-Invalid input parameter is detected.
+The input parameter is invalid.
 
 **Solution**
 
@@ -477,7 +478,7 @@ The specified directory is not empty.
 
 **Error Message**
 
-Too many symbolic links
+Too many symbolic links encountered
 
 **Possible Causes**
 
@@ -593,7 +594,7 @@ Quota exceeded
 
 **Possible Causes**
 
-The disk space is insufficient.
+The storage space is insufficient.
 
 **Solution**
 
@@ -926,3 +927,51 @@ Fail to notify agent
 **Solution**
 
 Check whether the client is normal.
+
+## Device-Cloud Synchronization Error Codes
+
+### 22400001 Cloud Unavailable
+
+**Error Message**
+
+Cloud status not ready
+
+**Possible Causes**
+
+1. The cloud is not enabled.
+
+2. The cloud synchronization switch is not enabled for the application.
+
+**Solution**
+
+1. Check that the user has logged in with a cloud account.
+
+2. Check that the cloud synchronization switch is enabled.
+
+### 22400002 Network Unavailable
+
+**Error Message**
+
+Network unavailable
+
+**Possible Causes**
+
+The device is not connected to the network or the network is unavailable.
+
+**Solution**
+
+Check the network status.
+
+### 22400003 Low Battery Level
+
+**Error Message**
+
+Battery level warning
+
+**Possible Causes**
+
+The battery level is low.
+
+**Solution**
+
+Perform the operation after the battery is being charged or the battery level is restored.