update docs

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

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

@@ -19,7 +19,7 @@
     -   [Media](js-apis-media.md)
 -   Security
     - [User Authentication](js-apis-useriam-userauth.md)
-	- [Access Control](js-apis-abilityAccessCtrl.md)
+    - [Access Control](js-apis-abilityAccessCtrl.md)
 -   Data Management
     -   [File Management](js-apis-fileio.md)
     -   [Lightweight Storage](js-apis-data-storage.md)
@@ -27,8 +27,16 @@
     -   [Relational Database](js-apis-data-rdb.md)
     -   [Result Set](js-apis-data-resultset.md)
     -   [DataAbilityPredicates](js-apis-data-ability.md)
+- File Management
+    - [File Management](js-apis-fileio.md)
+    - [Statfs](js-apis-statfs.md)
+    - [Environment](js-apis-environment.md)
+    - [Public File Access and Management](js-apis-filemanager.md)
+    - [App Storage Statistics](js-apis-storage-statistics.md)
+    - [Volume Management](js-apis-volumemanager.md)
 -   Account Management
     -   [Distributed Account Management](js-apis-distributed-account.md)
+    -   [App Account Management](js-apis-appAccount.md)
 -   Telephony Service
     -   [Call](js-apis-call.md)
     -   [SMS](js-apis-sms.md)
@@ -38,7 +46,7 @@
     -   [WLAN](js-apis-wifi.md)  
 -   Device Management
     -   [Sensors](js-apis-sensor.md)
-    -   [Vibration](js-apis-vibrator.md)
+    -   [Vibrator](js-apis-vibrator.md)
     -   [Brightness](js-apis-brightness.md)
     -   [Battery Info](js-apis-battery-info.md)
     -   [Power Management](js-apis-power.md)

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

+# App Storage Statistics
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
+> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+## Modules to Import
+
+```js
+import storagestatistics from "@ohos.storagestatistics";
+```
+
+## System Capabilities
+
+SystemCapability.FileManagement.StorageService.SpatialStatistics
+
+## storagestatistics.getTotalSizeOfVolume
+
+getTotalSizeOfVolume(volumeUuid: string): Promise<number>
+
+Asynchronously obtains the total space of the specified volume. This method uses a promise to return the result.
+
+- Parameters
+
+  | Name| Type| Mandatory| Description|
+  | ---------- | ------ | ---- | ---- |
+  | volumeUuid | string | Yes| Universally unique identifier (UUID) of the volume.|
+
+- Return value
+
+  | Type| Description|
+  | --------------------- | ---------------- |
+  | Promise<number> | Promise used to return the total space of the volume.|
+
+- Example
+
+  ```js
+  let uuid = "";
+  storagestatistics.getTotalSizeOfVolume(uuid).then(function(number){
+      console.info("getTotalSizeOfVolume successfully:"+ number);
+  }).catch(function(err){
+      console.info("getTotalSizeOfVolume failed with error:"+ err);
+  });
+  ```
+
+## storagestatistics.getTotalSizeOfVolume
+
+getTotalSizeOfVolume(volumeUuid: string, callback:AsyncCallback<number>):void
+
+Asynchronously obtains the total space of the specified volume. This method uses a callback to return the result.
+
+- Parameters
+
+  | Name| Type| Mandatory| Description|
+  | ---------- | ------------------------------------ | ---- | -------------------------- |
+  | volumeUuid | string                               | Yes| UUID of the volume.|
+  | callback   | callback:AsyncCallback<number> | Yes| Callback invoked to return the total space of the volume.|
+
+- Example
+
+  ```js
+  let uuid = "";
+  storagestatistics.getTotalSizeOfVolume(uuid, function(error, number){
+      // Do something
+  });
+  ```
+
+  
+
+## storagestatistics.getFreeSizeOfVolume
+
+getFreeSizeOfVolume(volumeUuid: string): Promise<number>
+
+Asynchronously obtains the available space of the specified volume. This method uses a promise to return the result.
+
+- Parameters
+
+  | Name| Type| Mandatory| Description|
+  | ---------- | ------ | ---- | ---- |
+  | volumeUuid | string | Yes| UUID of the volume.|
+
+- Return value
+
+  | Type| Description|
+  | --------------------- | ------------------ |
+  | Promise<number> | Promise used to return the available space of the volume.|
+
+- Example
+
+  ```js
+  let uuid = "";
+  storagestatistics.getFreeSizeOfVolume(uuid).then(function(number){
+      console.info("getFreeSizeOfVolume successfully:"+ number);
+  }).catch(function(err){
+      console.info("getFreeSizeOfVolume failed with error:"+ err);
+  });
+  
+  ```
+
+## storagestatistics.getFreeSizeOfVolume
+
+getFreeSizeOfVolume(volumeUuid: string, callback:AsyncCallback<number>):void
+
+Asynchronously obtains the available space of the specified volume. This method uses a callback to return the result.
+
+- 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
+
+  ```js
+  let uuid = "";
+  storagestatistics.getFreeSizeOfVolume(uuid, function(error, number){
+      // Do something
+  });
+  ```
+
+## storagestatistics.getBundleStats
+
+getBundleStats(volumeUuid: string,  packageName:String, ): Promise<BundleStats>
+
+Asynchronously obtains the bundle status on the specified volume. This method uses a promise to return the result.
+
+- Parameters
+
+  | Name| Type| Mandatory| Description|
+  | ----------- | ------ | ---- | -------- |
+  | volumeUuid  | string | Yes| UUID of the volume.|
+  | packageName | string | Yes| Bundle name of the app.|
+
+- Return value
+
+  | Type| Description|
+  | ------------------------------------------ | -------------------------- |
+  | Promise<[Bundlestats](#bundlestats)> | Promise used to return the bundle status on the volume.|
+
+- Example
+
+  ```js
+  let uuid = "";
+  let packageName = "";
+  storagestatistics.getBundleStats(uuid, packageName).then(function(BundleStats){
+      console.info("getBundleStats successfully:"+ JSON.stringify(BundleStats));
+  }).catch(function(err){
+      console.info("getBundleStats failed with error:"+ err);
+  });
+  ```
+
+## storagestatistics.getBundleStats
+
+getBundleStats(volumeUuid: string, callback:AsyncCallback<BundleStats>):void
+
+Asynchronously obtains the bundle status on the specified volume. This method uses a callback to return the result.
+
+- Parameters
+
+  | Name| Type| Mandatory| Description|
+  | ---------- | --------------------------------------------------------- | ---- | ------------------------------------ |
+  | volumeUuid | string                                                    | Yes| UUID of the volume.|
+  | callback   | callback:AsyncCallback<[Bundlestats](#bundlestats)> | Yes| Callback invoked to return the bundle status on the volume.|
+
+- Example
+
+  ```js
+  let uuid = "";
+  let packageName = "";
+  storagestatistics.getBundleStats(uuid, packageName, function(error, BundleStats){
+      // Do something
+  });
+  ```
+
+## BundleStats
+
+### Attributes
+
+| Name| Type| Description|
+| --------- | ------ | -------------- |
+| appSize   | number | Size of the app.|
+| cacheSize | number | Size of the cached data.|
+| dataSize  | number | Total data size of the app.|

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

+# Volume Management
+
+> ![icon-note.gif](public_sys-resources/icon-note.gif) **NOTE**
+> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
+
+## Modules to Import
+
+```js
+import volumemanager from "@ohos.volumemanager";
+```
+
+## System Capabilities
+
+SystemCapability.FileManagement.StorageService.Volume
+
+## volumemanager.getAllVolumes
+
+getAllVolumes(): Promise<Volume[]>
+
+Asynchronously obtains information about all available volumes. This method uses a promise to return the result.
+
+- Return value
+
+  | Type| Description|
+  | ---------------------------------- | -------------------------- |
+  | Promise<[Volume](#volume)[]> | Promise used to return the execution result.|
+
+- Example
+
+  ```js
+  volumemanager.getAllVolumes().then(function(volumes){
+      // do something
+  });
+  ```
+
+## volumemanager.getAllVolumes
+
+getAllVolumes(callback:AsyncCallback<Volume[]>):void
+
+Asynchronously obtains information about all available volumes. This method uses a callback to return the result.
+
+- Parameters
+
+  | Name| Type| Mandatory| Description|
+  | -------- | ------------------------------------------------- | ---- | ------------------------------------ |
+  | callback | callback:AsyncCallback<[Volume](#volume)[]> | Yes| Callback invoked to return the volume information obtained.|
+  
+- Example
+
+  ```js
+  let uuid = "";
+  volumemanager.getAllVolumes(uuid, function(error, volumes){
+      // do something
+  });
+  ```
+
+
+## volumemanager.mount
+
+mount(volumeId: string): Promise<boolean>
+
+Asynchronously mounts a volume. This method uses a promise to return the result.
+
+- Parameters
+
+  | Name| Type| Mandatory| Description|
+  | -------- | ------ | ---- | ---- |
+  | volumeId | string | Yes| Volume ID.|
+
+- Return value
+
+  | Type| Description|
+  | ---------------------- | ---------- |
+  | Promise<boolean> | Promise used to return the execution result.|
+
+- Example
+
+  ```js
+  let volumeId = "";
+  volumemanager.mount(volumeId).then(function(flag){
+      // do something
+  });
+  ```
+
+## volumemanager.mount
+
+mount(volumeId: string, callback:AsyncCallback<boolean>):void
+
+Asynchronously mounts a volume. This method uses a callback to return the result.
+
+- Parameters
+
+  | Name| Type| Mandatory| Description|
+  | -------- | ------------------------------------- | ---- | -------------------- |
+  | volumeId | string                                | Yes| Volume ID.|
+  | callback | callback:AsyncCallback<boolean> | Yes| Callback invoked to return the execution result.|
+
+- Example
+
+  ```js
+  let volumeId = "";
+  volumemanager.mount(volumeId, function(error, flag){
+      // do something
+  });
+  ```
+
+## volumemanager.unmount
+
+unmount(volumeId: string): Promise<boolean>
+
+Asynchronously unmounts a volume. This method uses a promise to return the result.
+
+- Parameters
+
+  | Name| Type| Mandatory| Description|
+  | -------- | ------ | ---- | ---- |
+  | volumeId | string | Yes| Volume ID.|
+
+- Return value
+
+  | Type| Description|
+  | ---------------------- | ---------- |
+  | Promise<boolean> | Promise used to return the execution result.|
+
+- Example
+
+  ```js
+  let volumeId = "";
+  volumemanager.unmount(volumeId).then(function(flag){
+      // do something
+  });
+  ```
+
+## volumemanager.unmount
+
+unmount(volumeId: string, callback:AsyncCallback<boolean>):void
+
+Asynchronously unmounts a volume. This method uses a callback to return the result.
+
+- Parameters
+
+  | Name| Type| Mandatory| Description|
+  | -------- | ------------------------------------- | ---- | -------------------- |
+  | volumeId | string                                | Yes| Volume ID.|
+  | callback | callback:AsyncCallback<boolean> | Yes| Callback invoked to return the execution result.|
+
+- Example
+
+  ```js
+  let volumeId = "";
+  volumemanager.unmount(volumeId, function(error, flag){
+      // do something
+  });
+  ```
+
+## Volume
+
+### Attributes
+
+| Name| Type| Description|
+| ----------- | ------- | -------------------- |
+| id          | number  | Volume ID.|
+| uuid        | string  | Universally unique identifier (UUID) of the volume.|
+| description | string  | Description of the volume.|
+| removeAble  | boolean | Whether the volume is a removable storage device.|
+| state       | int     | Current volume status.|
+| path        | string  | Mount address of the volume.|