I'm attempting to backup my iPhoto library to a 500gig WD Passport USB drive. The library is 18.37 gig. The transfer starts out great, with ~85 meg transferring in the first few seconds. Then the amount transferred starts ticking up 0.1 mb at a time, about once a second. It now estimates the time left at 5 hours and climbing. I've tried reconnecting the cable, etc. I don't experience this slow a transfer with this drive on any other computer. The drive is formatted FAT32 (don't ask). I'm on a 2012 MacBook Pro running OS X 10.8.... Thanks!