Ok, I just tried all music, I don't use it but have tried it a few times. As soon as I hit it, with a scanned 64gb card, the music instantly comes up. So you are doing a complete scan when you insert your card? Have you done a factory reset, just to make sure your software is functioning correctly? You could also reload the FW and then do a factory reset and then scan in the card and see if it still does it.