I have a Oppo A83 that I use as a dedicated audiobook, but having a problem finding and then deleting some files.
The files are sent via USB in MP3 format from my PC, which automatically places them into Playstore app called Audiobook 2 where they can be read but not deleted. For that I need to open File Manager, but sometimes the file doesn't appear there, although it's still showing in the Audiobook app. So where is it so I can delete it?