I would like an mp3 player that plays music from your (almost any cloud drive) but instead of streaming them, keeps local copies, preferably in mp3 format, and

I would like an mp3 player that plays music from your (almost any cloud drive) but instead of streaming them, keeps local copies, preferably in mp3 format, and preferably smart enough to not to just copy the entire collection, have configuravle max cache size, etc., cache is literally the mp3s instead of obsfucated.