I thought I was doing it right....I just got a 128GB Patriot drive (same unit used by some other folks), formatted FAT32, I dragged and dropped about 75GB of mostly AAC, some MP3 music from iTunes on my Mac over to the drive, successfully copied (although it seems to have skipped some of what I dragged over, can't tell what). It shows up when I plug it into the car, but hangs on the "Preparing to copy" step - I waited over 10 minutes. What did I do wrong? Where should I look? Is it a naming thing? I used no folders, just dragged over the tracks... Thanks!