---
title: MLMediaSourceCustomFoldersIdentifier
framework: medialibrary
role: symbol
role_heading: Global Variable
path: medialibrary/mlmediasourcecustomfoldersidentifier
---

# MLMediaSourceCustomFoldersIdentifier

The media source for custom folders. Currently, the only custom folder is the folder containing audio loops from Apple. This source provides data when MLMediaLoadFoldersKey is provided with the MLMediaLoadAppleLoops value.

## Declaration

```swift
let MLMediaSourceCustomFoldersIdentifier: String
```

## See Also

### Constants

- [Aperture Media Group Type Identifiers](medialibrary/aperture-media-group-type-identifiers.md)
- [Final Cut Pro Media Group Type Identifiers](medialibrary/final-cut-pro-media-group-type-identifiers.md)
- [Folders Media Group Type Identifiers](medialibrary/folders-media-group-type-identifiers.md)
- [GarageBand Media Group Type Identifiers](medialibrary/garageband-media-group-type-identifiers.md)
- [Logic Media Group Type Identifiers](medialibrary/logic-media-group-type-identifiers.md)
- [MLMediaLoadAppFoldersKey](medialibrary/mlmedialoadappfolderskey.md)
- [MLMediaLoadAppleLoops](medialibrary/mlmedialoadappleloops.md)
- [MLMediaLoadExcludeSourcesKey](medialibrary/mlmedialoadexcludesourceskey.md)
- [MLMediaLoadFoldersKey](medialibrary/mlmedialoadfolderskey.md)
- [MLMediaLoadIncludeSourcesKey](medialibrary/mlmedialoadincludesourceskey.md)
- [MLMediaLoadMoviesFolder](medialibrary/mlmedialoadmoviesfolder.md)
- [MLMediaLoadSourceTypesKey](medialibrary/mlmedialoadsourcetypeskey.md)
- [MLMediaSourceApertureIdentifier](medialibrary/mlmediasourceapertureidentifier.md)
- [MLMediaSourceAppDefinedFoldersIdentifier](medialibrary/mlmediasourceappdefinedfoldersidentifier.md)
- [MLMediaSourceFinalCutIdentifier](medialibrary/mlmediasourcefinalcutidentifier.md)