---
title: FileSystem
framework: fskit
role: symbol
role_heading: Associated Type
path: fskit/unaryfilesystemextension/filesystem-swift.associatedtype
---

# FileSystem

The type of file system your app extension provides.

## Declaration

```swift
associatedtype FileSystem : FSUnaryFileSystem, FSUnaryFileSystemOperations
```

## See Also

### Declaring the implemented file system

- [fileSystem](fskit/unaryfilesystemextension/filesystem-swift.property.md)