Files is an open source Swift library from John Sundell for working with files ion iOS, macOS and tvOS.
Files provides a straightforward object-oriented API for moving, deleting, reading, and writing files and folders.
This snippet from the readme shows an example of file and folder deletion and creation:
let file = try folder.createFile(named: "file.json")
try file.write(data: wrap(object))
You can find files on Github here.
A great Swift library for working with files.