I haven't seen an answer for this. My apologies if this has been covered. I'm trying to load up a bunch of MP3 files to an external memory card for this Navigator to have on tap. I've got them loaded and I even put them all in the root directory, but nothing shows up. The card is a 64gb card and I may question if that is too big to be recognized? It got formatted in exFat32 with the only other option NTFS (which I'm pretty sure it wouldn't recognize). Any tricks to this or is the card just too big?