The AnyTrans® One-Stop Content Manager for iOS has a $20 lifetime subscription that allows easy file backups and transfer between devices.

AnyTrans is a streamlined tool that lets you manage all of your iOS content in one place, and it just went on sale.

Documents, Readdle’s free iOS file manager, is now utilizing the power of Apple Extensions for an advanced filing experience. You can now access a revamped action menu that automatically highlights ...

And you'll notice the new file manager is very much constrained around PC-centric concepts. The tech available today and for the foreseeable future still has the equivalent steering wheels.

The latest update to OneDrive for iOS brings back the ability to write to OneDrive files with the iOS Files app. The update also includes several bug fixes.