You need to use an app to create a local directory first. Once that’s done you’ll get a “On My iDevice” option on the left side and you can freely create folders and move things around after that. I attached a photo showing it.
GoodReader is more of a files app then whatever the hell apple created ever could be. in goodreader you can store and upload files, create complex directories. open many file types right in the manager. its so much better. I thought apples file manager would replace GoodReader for me. no way in a million years could it replace it. apples file manager sucks so bad.
I have created a folder with FileMaster app, but I the “on my devicd” option wouldnt pop on Files.
Could you please post the app you used to create that folder? Thanks!