G-Technology G-DRIVE Mobile 500 GB Portable External Hard Drive (0G01667) Unique and stylish enclosure designed with the MacBook user in mind Bus powered -no AC adapter required USB 2.0, Firewire 400, Firewire 800 Interfaces 500GB Hard Drive Storage Capacity Compact size, weighs less than 9 oz 500GB Hard Drive Storage Capacity USB 2.0, Firewire 400, Firewire 800 Interfaces Compact size, weighs less than 9 oz Bus powered -no AC adapter required Unique and stylish enclosure designed with the MacBook user in mind