I thought some might find this useful. Tomorrow on Black Friday Target has some VERY good prices on WD external hard drives.
WD Elements External Hard Drive - 1 TB - $59.98
Western Digital Elements 500GB Portable Hard Drive - $59.98
Both of these are on the usb compatibility list as working for usb loading. I've been putting off getting an external drive but don't think I'll be passing this deal up. Happy hunting!