Whenever I plug my Nuvi 750 into my computer and try to load MP3s onto the SD card (which shows as a removable device alongside my Garmin) it doesn't let me format it. I get some error message "Windows was unable to format" whenever I try; I have the latest firmware for my Garmin. I've tried just putting the SD card in my Garmin (loaded with MP3s that I put on there by loading through my media card reader) but it doesn't recognize that I even have a card in. I've tried some troubleshooting that I found on the web, but nothing has worked. Sorry if this is a little incoherent...been drinking a little, I'll try and clarify if anyone is unclear.
