I'm honestly not quite sure what to tell you at this point. I can tell you that those are not pinned files from Google Play Music. When you tap through to the Audio storage, the Documents application opens and generates those "folders" based on track tags, not their actual location on your device. Pinned music from Google Play does not get stored with track tags, and is stored in a location that is not indexed under Audio storage (it is stored in /data/data/, which is included under Apps in the storage menu). The Audio menu will only populate based on items stored on your internal storage (usually mounted as /sdcard/) and your actual sdcard (usually mounted as /sdext/, or something similar).
I guess my next suggestion would be to use ES File Explorer again, make sure you set it to show hidden files, and use the built-in SD analyzer to see a listing of what is taking up the most space on your device. That should pull any folders with a lot of music files to the top since it seems to be taking up an appreciable amount of space.
I guess my next suggestion would be to use ES File Explorer again, make sure you set it to show hidden files, and use the built-in SD analyzer to see a listing of what is taking up the most space on your device. That should pull any folders with a lot of music files to the top since it seems to be taking up an appreciable amount of space.
