---
title: AVErrorFileSizeKey
framework: AVFoundation
role: symbol
role_heading: Global Variable
platforms: [iOS 4.0+, iPadOS 4.0+, Mac Catalyst 13.1+, macOS 10.7+, tvOS 9.0+, visionOS 1.0+, watchOS 1.0+]
path: avfoundation/averrorfilesizekey
---

# AVErrorFileSizeKey

The user information key to retrieve the file size in bytes.

## Declaration

```swift
let AVErrorFileSizeKey: String
```

## See Also

### User info keys

- [AVErrorDeviceKey](avfoundation/averrordevicekey.md)
- [AVErrorDiscontinuityFlagsKey](avfoundation/averrordiscontinuityflagskey.md)
- [AVErrorFileTypeKey](avfoundation/averrorfiletypekey.md)
- [AVErrorMediaTypeKey](avfoundation/averrormediatypekey.md)
- [AVErrorMediaSubTypeKey](avfoundation/averrormediasubtypekey.md)
- [AVErrorPersistentTrackIDKey](avfoundation/averrorpersistenttrackidkey.md)
- [AVErrorPIDKey](avfoundation/averrorpidkey.md)
- [AVErrorPresentationTimeStampKey](avfoundation/averrorpresentationtimestampkey.md)
- [AVErrorRecordingSuccessfullyFinishedKey](avfoundation/averrorrecordingsuccessfullyfinishedkey.md)
- [AVErrorTimeKey](avfoundation/averrortimekey.md)