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# Offline playback and storage

Download streamed content to disk to allow offline playback, and define policies to automatically remove downloaded assets.

## Topics

### Asset downloading

[Using AVFoundation to play and persist HTTP live streams](/documentation/AVFoundation/using-avfoundation-to-play-and-persist-http-live-streams)

Play HTTP Live Streams and persist streams on disk for offline playback using AVFoundation.

[`AVAssetDownloadURLSession`](/documentation/AVFoundation/AVAssetDownloadURLSession)

A URL session that creates and manages asset download tasks.

[`AVAssetDownloadTask`](/documentation/AVFoundation/AVAssetDownloadTask)

A URL session task that downloads a remote asset to the device for offline playback.

[`AVAggregateAssetDownloadTask`](/documentation/AVFoundation/AVAggregateAssetDownloadTask)

A task that downloads multiple media selections for an asset.

### Offline storage management

[`AVAssetDownloadStorageManager`](/documentation/AVFoundation/AVAssetDownloadStorageManager)

An object that manages policies to automatically purge downloaded assets.

[`AVAssetDownloadStorageManagementPolicy`](/documentation/AVFoundation/AVAssetDownloadStorageManagementPolicy)

An object that defines a policy to automatically manage the storage of downloaded assets.

[`AVMutableAssetDownloadStorageManagementPolicy`](/documentation/AVFoundation/AVMutableAssetDownloadStorageManagementPolicy)

A mutable object that you use to create a new storage management policy.

### Cache monitoring

[`AVAssetCache`](/documentation/AVFoundation/AVAssetCache)

An object that you use to inspect locally cached media data.


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