update docs

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

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

@@ -17,15 +17,31 @@ import fileio from '@ohos.fileio';
 
 Before using the APIs provided by this module to perform operations on files or directories, obtain the path of the application sandbox as follows:
 
+Stage Model
+
+ ```js
+import Ability from '@ohos.application.Ability';
+class MainAbility extends Ability {
+    onWindowStageCreate(windowStage) {
+        let context = this.context;
+        let path = context.filesDir;
+    }
+}
+ ```
+
+ For details about how to obtain the stage model context, see [Stage Model](https://gitee.com/openharmony/docs/blob/master/en/application-dev/reference/apis/js-apis-ability-context.md#abilitycontext).
+
+FA Model
+
  ```js
  import featureAbility from '@ohos.ability.featureAbility';
  let context = featureAbility.getContext();
- let path = '';
  context.getFilesDir().then((data) => {
-      path = data;
+      let path = data;
  })
  ```
  
+ For details about how to obtain the context of the FA model, see [FA Model](https://gitee.com/openharmony/docs/blob/master/en/application-dev/reference/apis/js-apis-Context.md#context).
 
 ## fileio.stat
 
@@ -654,7 +670,7 @@ Reads data from a file. This API uses a promise to return the result.
   let fd = fileio.openSync(path, 0o2);
   let buf = new ArrayBuffer(4096);
   fileio.read(fd, buf).then(function(readOut){
-      console.info("Read file data");
+      console.info("Read file data successfully");
       console.log(String.fromCharCode.apply(null, new Uint8Array(readOut.buffer)));
   }).catch(function(err){
       console.info("Failed to read file data. Error:"+ err);
@@ -690,7 +706,7 @@ Reads data from a file. This API uses an asynchronous callback to return the res
   let buf = new ArrayBuffer(4096);
   fileio.read(fd, buf, function (err, readOut) {
       if (readOut) {
-          console.info("Read file data");
+          console.info("Read file data successfully");
           console.log(String.fromCharCode.apply(null, new Uint8Array(readOut.buffer)));
       }
   });
@@ -1263,7 +1279,7 @@ Truncates a file based on the file descriptor. This API uses an asynchronous cal
   | -------- | ------------------------- | ---- | ---------------- |
   | fd       | number                    | Yes   | File descriptor of the file to truncate.    |
   | len      | number                    | Yes   | File length, in bytes, after truncation.|
-  | callback | AsyncCallback<void> | Yes   | Callback that returns no value. |
+  | callback | AsyncCallback<void> | Yes   | Callback that returns no value.|
 
 **Example**
 
@@ -1347,7 +1363,7 @@ Truncates a file based on the file path. This API uses an asynchronous callback
 | -------- | ------------------------- | ---- | -------------------------------- |
 | path     | string                    | Yes  | Application sandbox path of the file to truncate.|
 | len      | number                    | Yes  | File length, in bytes, after truncation.|
-| callback | AsyncCallback<void> | Yes  | Callback that returns no value.  |
+| callback | AsyncCallback<void> | Yes  | Callback that returns no value.|
 
 **Example**
 
@@ -1411,7 +1427,7 @@ Reads the text content of a file. This API uses a promise to return the result.
 
   ```js
   fileio.readText(path).then(function(str) {
-      console.info("Read text:"+ str);
+      console.info("Read text successfully:"+ str);
   }).catch(function(err){
       console.info("Failed to read the text. Error:"+ err);
   });
@@ -2720,7 +2736,7 @@ Stops the **watcher** instance. This API uses a promise to return the result.
 
   ```js
   let filename = path +"/test.txt";
-  let watcher = await fileio.createWatcher(filename, 1, function(number){
+  let watcher = fileio.createWatcher(filename, 1, function(number){
       console.info("Monitoring times: "+number);
   });
   watcher.stop().then(function(){
@@ -2747,7 +2763,7 @@ Stops the **watcher** instance. This API uses an asynchronous callback to return
 
   ```js
   let filename = path +"/test.txt";
-  let watcher = await fileio.createWatcher(filename, 1, function(number){
+  let watcher = fileio.createWatcher(filename, 1, function(number){
       console.info("Monitoring times: "+number);
   });
   watcher.stop(function(){
@@ -3124,7 +3140,6 @@ Reads the next directory entry. This API uses a promise to return the result.
 **Example**
 
   ```js
-  let dir = fileio.opendirSync(path);
   dir.read().then(function (dirent){
       console.log("Read the next directory entry:"+JSON.stringify(dirent));
   }).catch(function(err){
@@ -3150,7 +3165,6 @@ Reads the next directory entry. This API uses an asynchronous callback to return
 **Example**
 
   ```js
-  let dir = fileio.opendirSync(path);
   dir.read(function (err, dirent) {
       if (dirent) {
           // Do something
@@ -3177,7 +3191,6 @@ Synchronously reads the next directory entry.
 **Example**
 
   ```js
-  let dir = fileio.opendirSync(path);
   let dirent = dir.readSync();
   ```
 
@@ -3193,7 +3206,6 @@ Closes a directory. This API uses a promise to return the result. After a direct
 **Example**
 
   ```js
-  let dir = fileio.opendirSync(path);
   dir.close().then(function(err){
       console.info("close dir successfully");
   });
@@ -3211,7 +3223,6 @@ Closes a directory. This API uses an asynchronous callback to return the result.
 **Example**
 
   ```js
-  let dir = fileio.opendirSync(path);
   dir.close(function(err){
       console.info("close dir successfully");
   });
@@ -3229,7 +3240,6 @@ Closes a directory. After a directory is closed, the file descriptor in Dir will
 **Example**
 
   ```js
-  let dir = fileio.opendirSync(path);
   dir.closeSync();
   ```
 

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

 # Security Label
 
-The secuityLabel module provides APIs to manage file data security levels, including obtaining and setting file data security levels.
+The **secuityLabel** module provides APIs to manage file data security levels, including obtaining and setting file data security levels.
 
 > **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.

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

 # App Storage Statistics
 
-The storageStatistics module provides APIs for obtaining storage space information, including the space of built-in and plug-in memory cards, space occupied by different types of data, and space of application data.
+The **storageStatistics** module provides APIs for obtaining storage space information, including the space of built-in and plug-in memory cards, space occupied by different types of data, and space of application data.
 
 > **NOTE**<br/>
 >
@@ -264,14 +264,13 @@ Asynchronously obtains space information of the current third-party application.
 
 ## BundleStats<sup>9+</sup>
 
+### Attributes
+
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
 
 This is a system API and cannot be called by third-party applications.
 
-
-### Attributes
-
 | Name     | Type  | Description          |
 | --------- | ------ | -------------- |
 | appSize   | number | Size of the application.   |
@@ -523,14 +522,13 @@ This is a system API and cannot be called by third-party applications.
 
 ## StorageStats<sup>9+</sup>
 
+### Attributes
+
 **System capability**: SystemCapability.FileManagement.StorageService.SpatialStatistics
 
 
 This is a system API and cannot be called by third-party applications.
 
-
-### Attributes
-
 | Name     | Type  | Description          |
 | --------- | ------ | -------------- |
 | total   | number | Total space of the built-in memory card.   |

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

@@ -204,7 +204,11 @@ Asynchronously obtains volume information based on the universally unique identi
 
   ```js
   let uuid = "";
-  let volume = await volumemanager.getVolumeByUuid(uuid);
+  volumemanager.getVolumeByUuid(uuid).then(function(volume) {
+      console.info("getVolumeByUuid successfully:" + JSON.stringify(volume));
+  }).catch(function(error){
+      console.info("getVolumeByUuid failed with error:"+ error);
+  });
   ```
 
 ## volumemanager.getVolumeByUuid
@@ -235,7 +239,7 @@ Asynchronously obtains volume information based on the UUID. This API uses a cal
 
 ## volumemanager.getVolumeById
 
-getVolumeById(id: string): Promise<Volume>
+getVolumeById(volumeId: string): Promise<Volume>
 
 Asynchronously obtains volume information based on the volume ID. This API uses a promise to return the result.
 
@@ -247,7 +251,7 @@ Asynchronously obtains volume information based on the volume ID. This API uses
 
   | Name   | Type   | Mandatory | Description|
   | -------- | ------ | ---- | ---- |
-  | id | string | Yes  | Volume ID.|
+  | volumeId | string | Yes  | Volume ID.|
 
 **Return value**
 
@@ -258,13 +262,17 @@ Asynchronously obtains volume information based on the volume ID. This API uses
 **Example**
 
   ```js
-  let id = "";
-  let volume = await volumemanager.getVolumeById(id);
+  let volumeId = "";
+  volumemanager.getVolumeById(volumeId).then(function(volume) {
+      console.info("getVolumeById successfully:" + JSON.stringify(volume));
+  }).catch(function(error){
+      console.info("getVolumeById failed with error:"+ error);
+  });
   ```
 
 ## volumemanager.getVolumeById
 
-getVolumeById(id: string, callback: AsyncCallback<Volume>): void
+getVolumeById(volumeId: string, callback: AsyncCallback<Volume>): void
 
 Asynchronously obtains volume information based on the volume ID. This API uses a callback to return the result.
 
@@ -275,15 +283,15 @@ Asynchronously obtains volume information based on the volume ID. This API uses
 **Parameters**
 
   | Name  | Type                     | Mandatory| Description                         |
-    | -------- | ------------------------------------------------ | ---- | -------------------- |
-  | id | string                                              | Yes  | Volume ID.                |
-  | callback | callback:AsyncCallback<[Volume](#volume)>  | Yes  | Callback invoked to return the volume information obtained.|
+  | -------- | ------------------------- | ---- | ----------------------------- |
+  | volumeId | string                    | Yes  | Volume ID.               |
+  | callback | callback:AsyncCallback<[Volume](#volume)> | Yes  | Callback invoked to return the volume information obtained. |
 
 **Example**
 
   ```js
-  let id = "";
-  volumemanager.getVolumeById(id, (error, volume) => {
+  let volumeId = "";
+  volumemanager.getVolumeById(volumeId, (error, volume) => {
       // Do something.   
   });
   ```
@@ -316,7 +324,11 @@ Asynchronously sets the volume description based on the UUID. This API uses a pr
   ```js
   let uuid = "";
   let description = "";
-  let bool = await volumemanager.setVolumeDescription(uuid, description);
+  volumemanager.setVolumeDescription(uuid, description).then(function() {
+      console.info("setVolumeDescription successfully");
+  }).catch(function(error){
+      console.info("setVolumeDescription failed with error:"+ error);
+  });
   ```
 
 ## volumemanager.setVolumeDescription
@@ -349,7 +361,7 @@ Asynchronously sets the volume description based on the UUID. This API uses a ca
 
 ## volumemanager.format
 
-format(volId: string): Promise<void>
+format(volumeId: string, fsType: string): Promise<void>
 
 Asynchronously formats a volume. This API uses a promise to return the result.
 
@@ -361,24 +373,30 @@ Asynchronously formats a volume. This API uses a promise to return the result.
 
   | Name      | Type  | Mandatory| Description|
   | ----------- | ------ | ---- | ---- |
-  | volId    | string | Yes  | Volume ID.|
+  | volumeId    | string | Yes  | Volume ID.|
+  | fsType    | string | Yes  | File system type.|
 
 **Return value**
 
   | Type                  | Description      |
-    | --------------------- | ----------------------- |
-  | Promise<void> | Promise used to return the result.           |
+  | ---------------------- | ---------- |
+  | Promise<void> | Promise used to return the result.|
 
 **Example**
 
   ```js
-  let volId = "";
-  let bool = await volumemanager.format(volId);
+  let volumeId = "";
+  let fsType = "";
+  volumemanager.format(volumeId, fsType).then(function() {
+      console.info("format successfully");
+  }).catch(function(error){
+      console.info("format failed with error:"+ error);
+  });
   ```
 
 ## volumemanager.format
 
-format(volId: string, callback: AsyncCallback<void>): void
+format(volumeId: string, fsType: string, callback: AsyncCallback<void>): void
 
 Asynchronously formats a volume. This API uses a callback to return the result.
 
@@ -389,22 +407,24 @@ Asynchronously formats a volume. This API uses a callback to return the result.
 **Parameters**
 
   | Name  | Type                     | Mandatory| Description                         |
-    | -------- | --------------------------------------- | ---- | ---------------- |
-  | volId   | string                                  | Yes  | Volume ID.           |
-  | callback   | callback:AsyncCallback<void>   | Yes  | Callback invoked to return the result. |
+  | -------- | ------------------------- | ---- | ----------------------------- |
+  | volumeId | string                    | Yes  | Volume ID.               |
+  | fsType    | string | Yes  | File system type.|
+  | callback | callback:AsyncCallback<void>  | Yes  | Called after the volume is formatted. |
 
 **Example**
 
   ```js
-  let volId = "";
-  volumemanager.format(volId, (error, bool) => {
+  let volumeId = "";
+  let fsType = "";
+  volumemanager.format(volumeId, fsType, (error, bool) => {
       // Do something.   
   });
   ```
 
 ## volumemanager.partition
 
-partition(volId: string, fstype: string): Promise<void>
+partition(diskId: string, type: number): Promise<void>
 
 Asynchronously partitions a disk. This API uses a promise to return the result.
 
@@ -416,8 +436,8 @@ Asynchronously partitions a disk. This API uses a promise to return the result.
 
   | Name      | Type  | Mandatory| Description|
   | ----------- | ------ | ---- | ---- |
-  | volId    | string | Yes  | ID of the disk to which the volume belongs.|
-  | fstype      | string | Yes  | Partition type.   |
+  | diskId    | string | Yes  | ID of the disk to which the volume belongs.|
+  | type      | number | Yes  | Partition type.   |
 
 **Return value**
 
@@ -428,14 +448,18 @@ Asynchronously partitions a disk. This API uses a promise to return the result.
 **Example**
 
   ```js
-  let volId = "";
-  let fstype = "";
-  let bool = await volumemanager.partition(volId, fstype);
+  let diskId = "";
+  let type = 0;
+  volumemanager.partition(diskId, type).then(function() {
+      console.info("partition successfully");
+  }).catch(function(error){
+      console.info("partition failed with error:"+ error);
+  });
   ```
 
 ## volumemanager.partition
 
-partition(volId: string, fstype : string, callback: AsyncCallback<void>): void
+partition(diskId: string, type: number, callback: AsyncCallback<void>): void
 
 Asynchronously partitions a disk. This API uses a callback to return the result.
 
@@ -447,16 +471,16 @@ Asynchronously partitions a disk. This API uses a callback to return the result.
 
   | Name     | Type                                  | Mandatory| Description             |
   | -------- | --------------------------------------- | ---- | ---------------- |
-  | volId   | string                                  | Yes  | ID of the disk to which the volume belongs.     |
-  | fstype     | string                                  | Yes  | Partition type.          |
+  | diskId   | string                                  | Yes  | ID of the disk to which the volume belongs.     |
+  | type     | number                                  | Yes  | Partition type.          |
   | callback | callback:AsyncCallback<void>   | Yes  | Callback invoked to return the result.     |
 
 **Example**
 
   ```js
-  let volId = "";
-  let fstype = "";
-  volumemanager.format(volId, fstype, (error, bool) => {
+  let diskId = "";
+  let type = 0;
+  volumemanager.partition(diskId, type, (error, bool) => {
       // Do something.   
   });
   ```
@@ -471,6 +495,7 @@ Asynchronously partitions a disk. This API uses a callback to return the result.
 | ----------- | ------- | -------------------- |
 | id          | string  | Volume ID.                |
 | uuid        | string  | UUID of the volume.              |
+| diskId      | string  | ID of the disk to which the volume belongs.       |
 | description | string  | Description of the volume.          |
 | removable   | boolean | Whether the volume is a removable storage device.|
 | state       | number  | Volume state.          |