| type | string | Yes | Event type. The value is **cooperation**. |
| type | string | Yes | Event type. The value is **cooperation**. |
| callback | AsyncCallback<void> | No | Callback to be unregistered. If this parameter is not specified, all callbacks registered by the current application will be unregistered.|
| callback | AsyncCallback\<void> | No | Callback to be unregistered. If this parameter is not specified, all callbacks registered by the current application will be unregistered.|
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/>
> **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.
> 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.
> - API version 9 is a canary version for trial use. The APIs of this version may be unstable.