I recently moved all my music to Microsoft OneDrive. I tried to edit an album (directory), but it's no longer showing the MP3 files. I am using the File/Change Directory on the navigation bar to select the folder on OneDrive. Should this work, or is OneDrive not supported?
Just as a test:
Can you drag & drop your OneDrive-directory into Mp3tag and see the MP3 files then?
If you start the folder selection, then the contained files are never shown, only other objects of the type directory.
So do you find the folder that is managed by Onedrive?
I figured the problem out. Somehow I turned on a filer in mp3Tag to filter %track%. After deleting the filter the folder contents are displaying the .mp3s now.