update docs

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

en/application-dev/reference/apis/js-apis-document.md

 # File Interaction
 
-> **NOTE**<br>
+> **NOTE**<br/>
 > - The initial APIs of this module are supported since API version 6. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 > - The APIs of this module will be deprecated and are not recommended for use. An exception will be thrown if any of the APIs is called.
 
@@ -12,28 +12,29 @@ import document from '@ohos.document';
 
 ## document.choose
 
-choose(type:string[]): Promise&lt;string&gt;
+choose(types? : string[]): Promise&lt;string&gt;
 
 Chooses a file of the specified type using the file manager. This API uses a promise to return the result.
 
-**System capability**: SystemCapability.FileManagement.File.FileIO
+**System capability**: SystemCapability.FileManagement.UserFileService
 
-- Parameters
+**Parameters**
 
-| Name| Type | Mandatory | Description |
-| ------ | ------ | ---- | ---------------------------- |
-| type | string[] | No | Type of the file to choose. |
+  | Name| Type  | Mandatory| Description                        |
+  | ------ | ------ | ---- | ---------------------------- |
+  | types   | string[] | No  | Type of the file to choose.|
 
-- Return value
+**Return value**
 
-| Type | Description |
-| --------------------- | -------------- |
-| Promise&lt;string&gt; | Promise used to return the result. An error code is returned. |
+  | Type                 | Description          |
+  | --------------------- | -------------- |
+  | Promise&lt;string&gt; | Promise used to return the result. An error code is returned.|
 
-- Example
+**Example**
 
   ```js
-  await document.choose(type);
+  let types = [];
+  document.choose(types);
   ```
 ## document.choose
 
@@ -41,91 +42,98 @@ choose(callback:AsyncCallback&lt;string&gt;): void
 
 Chooses a file using the file manager. This API uses an asynchronous callback to return the result.
 
-**System capability**: SystemCapability.FileManagement.File.FileIO
+**System capability**: SystemCapability.FileManagement.UserFileService
 
-- Parameters
+**Parameters**
 
-| Name | Type | Mandatory | Description |
-| -------- | --------------------------- | ---- | ---------------------------- |
-| callback | AsyncCallback&lt;string&gt; | Yes | Callback used to return the result. An error code is returned. |
+  | Name  | Type                       | Mandatory| Description                        |
+  | -------- | --------------------------- | ---- | ---------------------------- |
+  | callback | AsyncCallback&lt;string&gt; | Yes  | Callback used to return the result. An error code is returned.|
 
-- Example
+**Example**
 
   ```js
-  await document.choose(function(err, uri) {
+  let uri = "";
+  document.choose(function(err, uri) {
         // Do something with the URI. 
   });
   ```
 ## document.choose
 
-choose(type:string[], callback:AsyncCallback&lt;string&gt;): void
+choose(types:string[], callback:AsyncCallback&lt;string&gt;): void
 
-Chooses a file of the specified type using the file manager. This API uses an asynchronous callback to return the result.
+Chooses a file using the file manager. This API uses an asynchronous callback to return the result.
 
-**System capability**: SystemCapability.FileManagement.File.FileIO
+**System capability**: SystemCapability.FileManagement.UserFileService
 
-- Parameters
+**Parameters**
 
-| Name | Type | Mandatory | Description |
-| -------- | --------------------------- | ---- | ---------------------------- |
-| type | string[] | No | Type of the file to choose. |
-| callback | AsyncCallback&lt;string&gt; | Yes | Callback used to return the result. An error code is returned. |
+  | Name  | Type                       | Mandatory| Description                        |
+  | -------- | --------------------------- | ---- | ---------------------------- |
+  | types    | string[]                      | No  | Type of the file to choose.|
+  | callback | AsyncCallback&lt;string&gt; | Yes  | Callback used to return the result. An error code is returned.|
 
-- Example
+**Example**
 
   ```js
-  await document.choose(type, function(err, uri) {
+  let types = [];
+  let uri = "";
+  document.choose(types, function(err, uri) {
         // Do something with the URI. 
   });
   ```
 
 ## document.show
 
-show(url:string, type:string):Promise&lt;number&gt;
+show(uri:string, type:string):Promise&lt;void&gt;
 
 Opens a file. This API uses a promise to return the result.
 
-**System capability**: SystemCapability.FileManagement.File.FileIO
+**System capability**: SystemCapability.FileManagement.UserFileService
 
-- Parameters
+**Parameters**
 
-| Name | Type | Mandatory | Description |
-| ---- | ------ | ---- | ---------------------------- |
-| uri | string | Yes | URI of the file to open. |
-| type | string | Yes | Type of the file to open. |
+  | Name| Type  | Mandatory| Description                        |
+  | ---- | ------ | ---- | ---------------------------- |
+  | uri | string | Yes  | URI of the file to open.|
+  | type | string | Yes  | Type of the file to open.|
 
-- Return value
+**Return value**
 
-| Type | Description |
-| --------------------- | ------------ |
-| Promise&lt;void&gt; | Promise used to return the result. An error code is returned. |
+  | Type                 | Description        |
+  | --------------------- | ------------ |
+  | Promise&lt;void&gt; | Promise used to return the result. An error code is returned.|
 
-- Example
+**Example**
 
   ```js
-  await document.show(uri, type);
+  let type = "";
+  let uri = "";
+  document.show(uri, type);
   ```
 
 ## document.show
 
-show(url:string, type:string, callback:AsyncCallback&lt;void&gt;): void
+show(uri:string, type:string, callback:AsyncCallback&lt;void&gt;): void
 
 Opens a file. This API uses an asynchronous callback to return the result.
 
-**System capability**: SystemCapability.FileManagement.File.FileIO
+**System capability**: SystemCapability.FileManagement.UserFileService
 
-- Parameters
+**Parameters**
 
-| Name | Type | Mandatory | Description |
-| -------- | --------------------------- | ---- | ---------------------------- |
-| uri | string | Yes | URI of the file to open. |
-| type | string | Yes | Type of the file to open. |
-| callback | AsyncCallback&lt;void&gt; | Yes | Callback used to return the result. An error code is returned. |
+  | Name  | Type                       | Mandatory| Description                        |
+  | -------- | --------------------------- | ---- | ---------------------------- |
+  | uri | string | Yes  | URI of the file to open.|
+  | type | string | Yes  | Type of the file to open.|
+  | callback | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result. An error code is returned.  |
 
-- Example
+**Example**
 
   ```js
-  await document.show(uri, type, function(err) {
+  let type = "";
+  let uri = "";
+  document.show(uri, type, function(err) {
         //do something
   });
   ```

en/application-dev/reference/apis/js-apis-securityLabel.md

@@ -3,7 +3,7 @@
 > **NOTE**<br/>
 > The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
 
-The APIs of this module can be used to obtain and set file security levels.
+Manages file data security levels, including obtaining and setting file data security levels.
 
 ## Modules to Import
 
@@ -15,34 +15,26 @@ import securityLabel from '@ohos.securityLabel';
 
 Before using the APIs provided by this module to perform operations on a file or directory, obtain the path of the application sandbox. For details, see [getOrCreateLocalDir of the Context module](js-apis-Context.md).
 
-Application sandbox path of a file or directory = Application directory + File name or directory name
-
-For example, if the application directory obtained by using **getOrCreateLocalDir** is **dir** and the file name is **xxx.txt**, the application sandbox path of the file is as follows:
-
-```js
-let path = dir + "/xxx.txt";
-```
-
-The file descriptor is as follows:
-
 ```js
-let fd = fileio.openSync(path, 0o102, 0o666);
+import featureAbility from '@ohos.ability.featureAbility';
+let context = featureAbility.getContext();
+let path = context.getFilesDir();
 ```
 
 ## securityLabel.setSecurityLabel
 
-setSecurityLabel(path:string, dataLevel:string):Promise&lt;void&gt;
+setSecurityLabel(path:string, type:dataLevel):Promise&lt;void&gt;
 
 Sets the security label for a file in asynchronous mode. This API uses a promise to return the result.
 
-**System capability**: SystemCapability.FileManagement.File.DistributedFile
+**System capability**: SystemCapability.FileManagement.File.FileIO
 
 **Parameters**
 
 | Name   | Type      | Mandatory| Description                                        |
 | --------- | ------    | ---- | -------------------------------------------- |
 | path      | string    | Yes  | File path.                                    |
-| dataLevel | string | Yes  | File security level, which can be **s0**, **s1**, **s2**, **s3**, or **s4**.|
+| type      | dataLevel | Yes  | File security level, which can be **s0**, **s1**, **s2**, **s3**, or **s4**.|
 
 **Return value**
 
@@ -53,7 +45,8 @@ Sets the security label for a file in asynchronous mode. This API uses a promise
 **Example**
 
   ```js
-  securityLabel.setSecurityLabel(path, dataLevel).then(function(){
+  let type = "s4";
+  securityLabel.setSecurityLabel(path, type).then(function(){
       console.info("setSecurityLabel successfully");
   }).catch(function(error){
       console.info("setSecurityLabel failed with error:" + error);
@@ -62,46 +55,48 @@ Sets the security label for a file in asynchronous mode. This API uses a promise
 
 ## securityLabel.setSecurityLabel
 
-setSecurityLabel(path:string, dataLevel:string, callback: AsyncCallback&lt;void&gt;):void
+setSecurityLabel(path:string, type:dataLevel, callback: AsyncCallback&lt;void&gt;):void
 
 Sets the security label for a file in asynchronous mode. This API uses a callback to return the result.
 
-**System capability**: SystemCapability.FileManagement.File.DistributedFile
+**System capability**: SystemCapability.FileManagement.File.FileIO
 
 **Parameters**
 
 | Name   | Type                     | Mandatory| Description                                        |
 | --------- | ------------------------- | ---- | -------------------------------------------- |
 | path      | string                    | Yes  | File path.                                    |
-| dataLevel | string                    | Yes  | File security level, which can be **s0**, **s1**, **s2**, **s3**, or **s4**.|
+| type      | dataLevel                 | Yes  | File security level, which can be **s0**, **s1**, **s2**, **s3**, or **s4**.|
 | callback  | AsyncCallback&lt;void&gt; | Yes  | Callback used to return the result.                  |
 
 **Example**
 
   ```js
-  securityLabel.setSecurityLabel(path, dataLevel, function(error){
+  let type = "s4";
+  securityLabel.setSecurityLabel(path, type, function(error){
       console.info("setSecurityLabel:" + JSON.stringify(error));
   });
   ```
 ## securityLabel.setSecurityLabelSync
 
-setSecurityLabelSync(path:string, dataLevel:string):void
+setSecurityLabelSync(path:string, type:dataLevel):void
 
 Sets the security label for a file in synchronous mode.
 
-**System capability**: SystemCapability.FileManagement.File.DistributedFile
+**System capability**: SystemCapability.FileManagement.File.FileIO
 
 **Parameters**
 
 | Name   | Type  | Mandatory| Description                                        |
 | --------- | ------ | ---- | -------------------------------------------- |
 | path      | string | Yes  | File path.                                    |
-| dataLevel | string | Yes  | File security level, which can be **s0**, **s1**, **s2**, **s3**, or **s4**.|
+| type      | dataLevel | Yes  | File security level, which can be **s0**, **s1**, **s2**, **s3**, or **s4**.|
 
 **Example**
 
 ```js
-securityLabel.setSecurityLabelSync(path, dataLevel);
+let type = "s4";
+securityLabel.setSecurityLabelSync(path, type);
 ```
 
 ## securityLabel.getSecurityLabel
@@ -110,7 +105,7 @@ getSecurityLabel(path:string):Promise&lt;string&gt;
 
 Obtains the security label of a file in asynchronous mode. This API uses a promise to return the result.
 
-**System capability**: SystemCapability.FileManagement.File.DistributedFile
+**System capability**: SystemCapability.FileManagement.File.FileIO
 
 **Parameters**
 
@@ -127,8 +122,9 @@ Obtains the security label of a file in asynchronous mode. This API uses a promi
 **Example**
 
   ```js
-  securityLabel.getSecurityLabel(path).then(function(dataLevel){
-      console.log("getSecurityLabel successfully:" + dataLevel);
+  let type = "s4";
+  securityLabel.getSecurityLabel(path).then(function(type){
+      console.log("getSecurityLabel successfully:" + type);
   }).catch(function(error){
       console.log("getSecurityLabel failed with error:" + error);
   });
@@ -140,7 +136,7 @@ getSecurityLabel(path:string, callback:AsyncCallback&lt;string&gt;): void
 
 Obtains the security label of a file in asynchronous mode. This API uses a callback to return the result.
 
-**System capability**: SystemCapability.FileManagement.File.DistributedFile
+**System capability**: SystemCapability.FileManagement.File.FileIO
 
 **Parameters**
 
@@ -152,8 +148,9 @@ Obtains the security label of a file in asynchronous mode. This API uses a callb
 **Example**
 
   ```js
-  securityLabel.getSecurityLabel(function(error, dataLevel){
-      console.log("getSecurityLabel successfully:" + dataLevel);
+  let type = "s4";
+  securityLabel.getSecurityLabel(path,function(error, type){
+      console.log("getSecurityLabel successfully:" + type);
   });
   ```
 ## securityLabel.getSecurityLabelSync
@@ -162,7 +159,7 @@ getSecurityLabelSync(path:string):string
 
 Obtains the security label of a file in synchronous mode.
 
-**System capability**: SystemCapability.FileManagement.File.DistributedFile
+**System capability**: SystemCapability.FileManagement.File.FileIO
 
 **Parameters**
 

en/application-dev/reference/apis/js-apis-storage-statistics.md

@@ -10,10 +10,10 @@ Obtains storage space information, including the space of built-in and plug-in m
 ## Modules to Import
 
 ```js
-import storagestatistics from "@ohos.storageStatistics";
+import storageStatistics from "@ohos.storageStatistics";
 ```
 
-## storagestatistics.getTotalSizeOfVolume
+## storageStatistics.getTotalSizeOfVolume
 
 getTotalSizeOfVolume(volumeUuid: string): Promise<number>
 
@@ -23,32 +23,34 @@ Asynchronously obtains the total size of the specified volume. This API uses a p
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Parameters
+This is a system API and cannot be called by third-party applications.
+
+
+**Parameters**
 
   | Name    | Type  | Mandatory| Description|
   | ---------- | ------ | ---- | ---- |
   | volumeUuid | string | Yes  | UUID of the volume.|
 
-- Return value
+**Return value**
 
   | Type                 | Description            |
   | --------------------- | ---------------- |
   | Promise<number> | Promise used to return the total size of the volume.|
 
-- Example
+**Example**
 
   ```js
   let uuid = "";
-  storagestatistics.getTotalSizeOfVolume(uuid).then(function(number){
+  storageStatistics.getTotalSizeOfVolume(uuid).then(function(number){
       console.info("getTotalSizeOfVolume successfully:"+ number);
   }).catch(function(err){
       console.info("getTotalSizeOfVolume failed with error:"+ err);
   });
   ```
 
-## storagestatistics.getTotalSizeOfVolume
+## storageStatistics.getTotalSizeOfVolume
 
 getTotalSizeOfVolume(volumeUuid: string, callback:AsyncCallback<number>):void
 
@@ -58,28 +60,28 @@ Asynchronously obtains the total size of the specified volume. This API uses a c
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Parameters
+This is a system API and cannot be called by third-party applications.
+
+
+**Parameters**
 
   | Name    | Type                                | Mandatory| Description                      |
   | ---------- | ------------------------------------ | ---- | -------------------------- |
   | volumeUuid | string                               | Yes  | UUID of the volume.                      |
   | callback   | callback:AsyncCallback<number> | Yes  | Callback invoked to return the total size of the volume.|
 
-- Example
+**Example**
 
   ```js
   let uuid = "";
-  storagestatistics.getTotalSizeOfVolume(uuid, function(error, number){
+  storageStatistics.getTotalSizeOfVolume(uuid, function(error, number){
       // Do something.
       console.info("getTotalSizeOfVolume successfully:"+ number);
   });
   ```
 
-  
-
-## storagestatistics.getFreeSizeOfVolume
+## storageStatistics.getFreeSizeOfVolume
 
 getFreeSizeOfVolume(volumeUuid: string): Promise<number>
 
@@ -89,25 +91,27 @@ Asynchronously obtains the available space of the specified volume. This API use
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Parameters
+This is a system API and cannot be called by third-party applications.
+
+
+**Parameters**
 
   | Name    | Type  | Mandatory| Description|
   | ---------- | ------ | ---- | ---- |
   | volumeUuid | string | Yes  | UUID of the volume.|
 
-- Return value
+**Return value**
 
   | Type                 | Description              |
   | --------------------- | ------------------ |
   | Promise<number> | Promise used to return the available space of the volume.|
 
-- Example
+**Example**
 
   ```js
   let uuid = "";
-  storagestatistics.getFreeSizeOfVolume(uuid).then(function(number){
+  storageStatistics.getFreeSizeOfVolume(uuid).then(function(number){
       console.info("getFreeSizeOfVolume successfully:"+ number);
   }).catch(function(err){
       console.info("getFreeSizeOfVolume failed with error:"+ err);
@@ -115,7 +119,7 @@ Asynchronously obtains the available space of the specified volume. This API use
   
   ```
 
-## storagestatistics.getFreeSizeOfVolume
+## storageStatistics.getFreeSizeOfVolume
 
 getFreeSizeOfVolume(volumeUuid: string, callback:AsyncCallback<number>):void
 
@@ -125,26 +129,28 @@ Asynchronously obtains the available space of the specified volume. This API use
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Parameters
+This is a system API and cannot be called by third-party applications.
+
+
+**Parameters**
 
   | Name    | Type                                | Mandatory| Description                        |
   | ---------- | ------------------------------------ | ---- | ---------------------------- |
   | volumeUuid | string                               | Yes  | UUID of the volume.                        |
   | callback   | callback:AsyncCallback<number> | Yes  | Callback invoked to return the available space of the volume.|
 
-- Example
+**Example**
 
   ```js
   let uuid = "";
-  storagestatistics.getFreeSizeOfVolume(uuid, function(error, number){
+  storageStatistics.getFreeSizeOfVolume(uuid, function(error, number){
       // Do something.
       console.info("getFreeSizeOfVolume successfully:"+ number);
   });
   ```
 
-## storagestatistics.getBundleStats<sup>9+</sup>
+## storageStatistics.getBundleStats<sup>9+</sup>
 
 getBundleStats(packageName: string): Promise&lt;BundleStats&gt;
 
@@ -154,32 +160,34 @@ Asynchronously obtains space information of an application. This API uses a prom
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Parameters
+This is a system API and cannot be called by third-party applications.
+
+
+**Parameters**
 
   | Name     | Type  | Mandatory| Description    |
   | ----------- | ------ | ---- | -------- |
   | packageName | string | Yes  | Bundle name of the application.|
 
-- Return value
+**Return value**
 
   | Type                                      | Description                      |
   | ------------------------------------------ | -------------------------- |
   | Promise&lt;[Bundlestats](#bundlestats)&gt; | Promise used to return the space information obtained.|
 
-- Example
+**Example**
 
   ```js
   let packageName = "";
-  storagestatistics.getBundleStats(packageName).then(function(BundleStats){
+  storageStatistics.getBundleStats(packageName).then(function(BundleStats){
       console.info("getBundleStats successfully:"+ JSON.stringify(BundleStats));
   }).catch(function(err){
       console.info("getBundleStats failed with error:"+ err);
   });
   ```
 
-## storagestatistics.getBundleStats<sup>9+</sup>
+## storageStatistics.getBundleStats<sup>9+</sup>
 
 getBundleStats(packageName: string,  callback: AsyncCallback&lt;BundleStats&gt;): void
 
@@ -189,78 +197,80 @@ Asynchronously obtains space information of an application. This API uses a call
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Parameters
+This is a system API and cannot be called by third-party applications.
+
+
+**Parameters**
 
   | Name  | Type                                                     | Mandatory| Description                                |
   | -------- | --------------------------------------------------------- | ---- | ------------------------------------ |
   | packageName | string | Yes  | Bundle name of the application.|
   | callback | callback:AsyncCallback&lt;[Bundlestats](#bundlestats)&gt; | Yes  | Callback invoked to return the space information obtained.|
 
-- Example
+**Example**
 
   ```js
   let packageName = "";
-  storagestatistics.getBundleStats(packageName, function(error, BundleStats){
+  storageStatistics.getBundleStats(packageName, function(error, BundleStats){
       // Do something.
       console.info("getBundleStats successfully:"+ JSON.stringify(BundleStats));
   });
   ```
 
+## storageStatistics.getCurrentBundleStats<sup>9+</sup>
 
-
-## storagestatistics.getCurrentBundleStats<sup>9+</sup>
-
-getCurrentBundleStats(): Promise<BundleStats>
+getCurrentBundleStats(): Promise&lt;BundleStats&gt;
 
 Asynchronously obtains space information of the current third-party application. This API uses a promise to return the result.
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-- Return value
+**Return value**
 
   | Type                                       | Description                      |
   | ------------------------------------------ | -------------------------- |
   | Promise&lt;[Bundlestats](#bundlestats)&gt; | Promise used to return the space information obtained.     |
 
-- Example
+**Example**
 
   ```js
-      let bundleStats = await storageStatistics.getCurrentBundleStats();
+  let bundleStats = storageStatistics.getCurrentBundleStats();
   console.info("getCurrentBundleStats successfully:"+ JSON.stringify(bundleStats));
   ```
 
-## storagestatistics.getCurrentBundleStats<sup>9+</sup>
+## storageStatistics.getCurrentBundleStats<sup>9+</sup>
 
-getCurrentBundleStats(callback: AsyncCallback<BundleStats>): void
+getCurrentBundleStats(callback: AsyncCallback&lt;BundleStats&gt;): void
 
 Asynchronously obtains space information of the current third-party application. This API uses a callback to return the result.
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-- Parameters
+**Parameters**
 
   | Name   | Type                                                      | Mandatory | Description                                |
   | -------- | --------------------------------------------------------- | ---- | ------------------------------------ |
   | callback | callback:AsyncCallback&lt;[BundleStats](#bundlestats)&gt; | Yes  | Callback invoked to return the space information obtained.       |
 
-- Example
+**Example**
 
   ```js
-  storagestatistics.getCurrentBundleStats(function(error, bundleStats){
+  storageStatistics.getCurrentBundleStats(function(error, bundleStats){
       // Do something.
       console.info("getCurrentBundleStats successfully:"+ JSON.stringify(bundleStats));
   });
   ```
 
-  
-  
 ## BundleStats<sup>9+</sup>
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-- Attributes
+
+This is a system API and cannot be called by third-party applications.
+
+
+### Attributes
 
 | Name     | Type  | Description          |
 | --------- | ------ | -------------- |
@@ -269,11 +279,9 @@ Asynchronously obtains space information of the current third-party application.
 | dataSize  | number | Total data size of the application.|
 
 
+## storageStatistics.getTotalSize<sup>9+</sup>
 
-
-## storagestatistics.getTotalSize<sup>9+</sup>
-
-getTotalSize(): Promise<number>
+getTotalSize(): Promise&lt;number&gt;
 
 Obtains the total space of the built-in memory card. This API uses a promise to return the result.
 
@@ -281,24 +289,26 @@ Obtains the total space of the built-in memory card. This API uses a promise to
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Return value
+This is a system API and cannot be called by third-party applications.
+
+
+**Return value**
 
   | Type                  | Description              |
   | --------------------- | ------------------ |
   | Promise&lt;number&gt; | Promise used to return the total space of the built-in memory card.  |
 
-- Example
+**Example**
 
   ```js
-      let number = await storageStatistics.getTotalSize();
+  let number = storageStatistics.getTotalSize();
   console.info("getTotalSize successfully:"+ JSON.stringify(number));
   ```
 
-## storagestatistics.getTotalSize<sup>9+</sup>
+## storageStatistics.getTotalSize<sup>9+</sup>
 
-getTotalSize(callback: AsyncCallback<number>): void
+getTotalSize(callback: AsyncCallback&lt;number&gt;): void
 
 Obtains the total space of the built-in memory card. This API uses a callback to return the result.
 
@@ -306,27 +316,29 @@ Obtains the total space of the built-in memory card. This API uses a callback to
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Parameters
+This is a system API and cannot be called by third-party applications.
+
+
+**Parameters**
 
   | Name   | Type                                 | Mandatory | Description                    |
   | -------- | ------------------------------------ | ---- | ------------------------ |
   | callback | callback:AsyncCallback&lt;number&gt; | Yes  | Callback invoked to return the total space of the built-in memory card.|
 
-- Example
+**Example**
 
   ```js
-  storagestatistics.getTotalSize(function(error, number){
+  storageStatistics.getTotalSize(function(error, number){
       // Do something.
       console.info("getTotalSize successfully:"+ JSON.stringify(number));
   });
   ```
 
 
-## storagestatistics.getFreeSize<sup>9+</sup>
+## storageStatistics.getFreeSize<sup>9+</sup>
 
-getFreeSize(): Promise<number>
+getFreeSize(): Promise&lt;number&gt;
 
 Obtains the available space of the built-in memory card. This API uses a promise to return the result.
 
@@ -334,25 +346,27 @@ Obtains the available space of the built-in memory card. This API uses a promise
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Return value
+This is a system API and cannot be called by third-party applications.
+
+
+**Return value**
 
   | Type                  | Description              |
   | --------------------- | ------------------ |
   | Promise&lt;number&gt; | Promise used to return the available space of the built-in memory card.|
 
-- Example
+**Example**
 
   ```js
-      let number = await storageStatistics.getFreeSize();
+  let number = storageStatistics.getFreeSize();
   console.info("getFreeSize successfully:"+ JSON.stringify(number));
   ```
 
 
-## storagestatistics.getFreeSize<sup>9+</sup>
+## storageStatistics.getFreeSize<sup>9+</sup>
 
-getFreeSize(callback: AsyncCallback<number>): void
+getFreeSize(callback: AsyncCallback&lt;number&gt;): void
 
 Obtains the available space of the built-in memory card. This API uses a callback to return the result.
 
@@ -360,26 +374,26 @@ Obtains the available space of the built-in memory card. This API uses a callbac
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Parameters
+This is a system API and cannot be called by third-party applications.
+
+
+**Parameters**
 
   | Name   | Type                                 | Mandatory| Description                      |
   | -------- | ------------------------------------ | ---- | ------------------------- |
   | callback | callback:AsyncCallback&lt;number&gt; | Yes  | Callback invoked to return the available space of the built-in memory card.|
 
-- Example
+**Example**
 
   ```js
-  storagestatistics.getFreeSize(function(error, number){
+  storageStatistics.getFreeSize(function(error, number){
       // Do something.
       console.info("getFreeSize successfully:"+ JSON.stringify(number));
   });
   ```
 
-
-
-## storagestatistics.getSystemSize<sup>9+</sup>
+## storageStatistics.getSystemSize<sup>9+</sup>
 
 getSystemSize(): Promise&lt;number&gt;
 
@@ -389,25 +403,27 @@ Asynchronously obtains the system space. This API uses a promise to return the r
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Return value
+This is a system API and cannot be called by third-party applications.
+
+
+**Return value**
 
   | Type                 | Description            |
   | --------------------- | ---------------- |
   | Promise&lt;number&gt; | Promise used to return the system space obtained.|
 
-- Example
+**Example**
 
   ```js
-  storagestatistics.getSystemSize().then(function(number){
+  storageStatistics.getSystemSize().then(function(number){
       console.info("getSystemSize successfully:"+ number);
   }).catch(function(err){
       console.info("getSystemSize failed with error:"+ err);
   });
   ```
 
-## storagestatistics.getSystemSize<sup>9+</sup>
+## storageStatistics.getSystemSize<sup>9+</sup>
 
 getSystemSize(callback:AsyncCallback&lt;number&gt;):void
 
@@ -417,28 +433,28 @@ Asynchronously obtains the system space. This API uses a callback to return the
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Parameters
+This is a system API and cannot be called by third-party applications.
+
+
+**Parameters**
 
   | Name    | Type                                | Mandatory| Description                      |
   | ---------- | ------------------------------------ | ---- | -------------------------- |
   | callback   | callback:AsyncCallback&lt;number&gt; | Yes  | Callback used to return the system space obtained.|
 
-- Example
+**Example**
 
   ```js
-  storagestatistics.getSystemSize(function(error, number){
+  storageStatistics.getSystemSize(function(error, number){
       // Do something.
       console.info("getSystemSize successfully:"+ number);
   });
   ```
 
+## storageStatistics.getUserStorageStats<sup>9+</sup>
 
-  
-## storagestatistics.getUserStorageStats<sup>9+</sup>
-
-getUserStorageStats(userId?: string): Promise&lt;StorageStats&gt;
+getUserStorageStats(userId? : number): Promise&lt;StorageStats&gt;
 
 Asynchronously obtains the space occupied by each type of user data. This API uses a promise to return the result.
 
@@ -446,34 +462,36 @@ Asynchronously obtains the space occupied by each type of user data. This API us
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Parameters
+This is a system API and cannot be called by third-party applications.
+
+
+**Parameters**
 
   | Name    | Type  | Mandatory| Description|
   | ---------- | ------ | ---- | ---- |
-  | userId | string | No  | User ID.<br>-&nbsp; Set this parameter to the ID of the user to be queried.<br>-&nbsp; If no value is specified, information about the current user is queried.|
+  | userId | string | No  | User ID.<br>Value:<br>-&nbsp; Set this parameter to the ID of the user to be queried.<br>-&nbsp; If no value is specified, information about the current user is queried.|
 
-- Return value
+**Return value**
 
   | Type                 | Description            |
   | --------------------- | ---------------- |
   | Promise&lt;[StorageStats](#StorageStats)&gt; | Promise used to return the information obtained.|
 
-- Example
+**Example**
 
   ```js
   let userId = "";
-  storagestatistics.getUserStorageStats(userId).then(function(StorageStats){
+  storageStatistics.getUserStorageStats(userId).then(function(StorageStats){
       console.info("getUserStorageStats successfully:"+ JSON.stringify(StorageStats));
   }).catch(function(err){
       console.info("getUserStorageStats failed with error:"+ err);
   });
   ```
 
-## storagestatistics.getUserStorageStats<sup>9+</sup>
+## storageStatistics.getUserStorageStats<sup>9+</sup>
 
-getUserStorageStats(userId?: string, callback:AsyncCallback&lt;StorageStats&gt;):void
+getUserStorageStats(userId: number, callback:AsyncCallback&lt;StorageStats&gt;):void
 
 Asynchronously obtains the space occupied by each type of user data. This API uses a callback to return the result.
 
@@ -481,31 +499,37 @@ Asynchronously obtains the space occupied by each type of user data. This API us
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-**System API**: This is a system API and cannot be called by third-party applications.
 
-- Parameters
+This is a system API and cannot be called by third-party applications.
+
+
+**Parameters**
 
   | Name    | Type                                | Mandatory| Description                      |
   | ---------- | ------------------------------------ | ---- | -------------------------- |
-  | userId | string                               | No  | User ID.<br>-&nbsp; Set this parameter to the ID of the user to be queried.<br>-&nbsp; If no value is specified, information about the current user is queried.                      |
+  | userId | string                               | No  | User ID.<br>Value:<br>-&nbsp; Set this parameter to the ID of the user to be queried.<br>-&nbsp; If no value is specified, information about the current user is queried.                      |
   | callback   | callback:AsyncCallback&lt;[StorageStats](#StorageStats)&gt; | Yes  | Callback invoked to return the information obtained.|
 
-- Example
+**Example**
 
   ```js
-  storagestatistics.getUserStorageStats(userId, function(error, StorageStats){
+  let userId = "";
+  storageStatistics.getUserStorageStats(userId, function(error, StorageStats){
       // Do something.
       console.info("getUserStorageStats successfully:"+ JSON.stringify(StorageStats));
   });
   ```
 
 
-
 ## StorageStats<sup>9+</sup>
 
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
-- Attributes
+
+This is a system API and cannot be called by third-party applications.
+
+
+### Attributes
 
 | Name     | Type  | Description          |
 | --------- | ------ | -------------- |