I finally figured out how to convert mp4 to mp3. Figured out how to clean all the hidden files off the SD card. Now I have another issue. Is there a way to create album folders? Let me explain what I'm trying to do. The car player plays the music by track, 01, 02, 03, 04, etc. Problem is that every album has a track 01, so I get all track 01's playing. Is there a way to create a by album sequence? I'd like to be able to play all of Jimmy Buffet, George Strait, etc instead having them mixed with each other. Does this even make sense? Thanks so much.