I just got this player for christmas, and I popped my 8gb uSD card out of my old Fuze (which is now dead) and popped it into the Fuze+.
When booting it says error reading uSD card, format it as Fat32 (it already is), and when I try to re-format it from the player, it says no uSD card detected, even though I can access it over usb from my computer.
I guess the firmware still needs some work…
