1# Storage Space Statistics
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3### Introduction
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5This sample presents how to view the storage space usage, space of all installed applications, and available volumes of a device by using the application bundle management, application space statistics, and volume management modules.
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7This sample uses the [<**DataPanel** component>](https://gitee.com/openharmony/docs/blob/master/en/application-dev/reference/arkui-ts/ts-basic-components-datapanel.md) to display the space information about different applications; uses [**Bundle**](https://gitee.com/openharmony/docs/blob/master/en/application-dev/reference/apis/js-apis-Bundle.md) to obtain the application name and bundle information; uses [**App Space Statistics**](https://gitee.com/openharmony/docs/blob/master/en/application-dev/reference/apis/js-apis-file-storage-statistics.md) to obtain the storage space usage of the device; use [**Volume Management**](https://gitee.com/openharmony/docs/blob/master/en/application-dev/reference/apis/js-apis-file-volumemanager.md) to obtain information about available volumes of the device.
8Instructions:
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101. The main page displays the detailed information about the storage space usage of the current device.
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122. Tap **Application** to view the space of all installed applications.
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143. Tap **View Available Volumes** to view information about all available volumes of the device.
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16
17
18### Display Effect
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20![](./screenshots/device/main_page_en.png)
21![](./screenshots/device/application_page_en.png)
22![](./screenshots/device/volume_page_en.png)
23
24### Required Permissions
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26- Permission to obtain storage space information and available volumes: [ohos.permission.STORAGE_MANAGER](https://gitee.com/openharmony/docs/blob/master/en/application-dev/security/permission-list.md)
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28- Permission to obtain information about installed applications: [ohos.permission.GET_BUNDLE_INFO_PRIVILEGED](https://gitee.com/openharmony/docs/blob/master/en/application-dev/security/permission-list.md)
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30### Dependency
31
32N/A
33
34### Constraints
35
361. This sample can only be run on standard-system devices that use the Rockchip RK3568 development board.
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382. This sample is based on the stage model, which is supported from API version 10 (API Version 10 Release). 
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403. DevEco Studio (4.0 Release) must be used.
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424. This sample uses the **@ohos.bundle.innerBundleManager**, **@ohos.volumeManager**, and **@ohos.storageStatistics** system APIs. To use the full SDK, obtain it from a mirror site and switch to it in DevEco Studio. For details, see [Guide to Switching to Full SDK](https://docs.openharmony.cn/pages/v3.2/zh-cn/application-dev/quick-start/full-sdk-switch-guide.md/).
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445. This example uses the **system_core** permissions (see [App Permission List](https://gitee.com/openharmony/docs/blob/master/en/application-dev/security/permission-list.md)). You need to [configure a high-level permission signature](https://docs.openharmony.cn/pages/v3.2/en/application-dev/security/hapsigntool-overview.md/).
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