G-Technology G-Drive Combo 320GB USB 2.0/FireWire 3.5" External Hard Drive (Silver) G-Technology G-Drive Combo 320 GB 3.5-inch External Hard Drive General Features: Silver color 320 GB storage capacity USB 2.0 and FireWire interfaces 7200 RPM spindle speed 8 MB cache Unique industrial design Rugged, aluminum enclosure Integrated heat sink Fan-less cooling system Bridge: Oxford 934 chipset Windows and Mac compatible - Time Machine ready! Lead-free Connectors: One (1) Type B USB 2.0 port