I would just take it back as defective, it is covered under the warranty. I know I replaced my first Nav a month or so in as it would not charge or be powered by the bike, or take a charge when plugged into the wall. Should not be this many headaches. Alternately, if memory serves me there were two options in the mass storage menu, did you try both? I seem to remember that the one they recommended I try did not work but the other one did.