Might as well buy a laptop at that price point, at least then you'll get a real filesystem.
Please explain your snarky. the Files.app is a real file system, as are many available third party apps, I use documents by Readdle. I also use Onedrive, and Google Drive which are fully integrated in the Files.app and into Documents. documents also allows me to connect to USB drives and my time capsule Seems like you are stuck somewhere on ios 10.
But maybe your snark was not clear, I interpreted you to mean file browser. The actual file system, is well a real file system