# android.os.storage

Added in[API level 9](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)  

# android.os.storage

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[Kotlin](https://developer.android.com/reference/kotlin/android/os/storage/package-summary "View this page in Kotlin")\|Java

Contains classes for the system storage service, which manages binary asset filesystems known as Opaque Binary Blobs (OBBs).

## Classes

|-----------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------|
| [OnObbStateChangeListener](https://developer.android.com/reference/android/os/storage/OnObbStateChangeListener)                         | Used for receiving notifications from[StorageManager](https://developer.android.com/reference/android/os/storage/StorageManager)about OBB file states. |
| [StorageManager](https://developer.android.com/reference/android/os/storage/StorageManager)                                             | StorageManager is the interface to the systems storage service.                                                                                        |
| [StorageManager.StorageVolumeCallback](https://developer.android.com/reference/android/os/storage/StorageManager.StorageVolumeCallback) | Callback that delivers[StorageVolume](https://developer.android.com/reference/android/os/storage/StorageVolume)related events.                         |
| [StorageVolume](https://developer.android.com/reference/android/os/storage/StorageVolume)                                               | Information about a shared/external storage volume for a specific user.                                                                                |

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  ## Classes

  - [OnObbStateChangeListener](https://developer.android.com/reference/android/os/storage/OnObbStateChangeListener)
  - [StorageManager](https://developer.android.com/reference/android/os/storage/StorageManager)
  - [StorageManager.StorageVolumeCallback](https://developer.android.com/reference/android/os/storage/StorageManager.StorageVolumeCallback)
  - [StorageVolume](https://developer.android.com/reference/android/os/storage/StorageVolume)