G-Tech G-Drive, 500GB External Hard Drive Storage Solution, with Dual FireWire 800 & One Firewire 400 Interface, for Mac & Windows. External disk storage solutions for Macs and PCs FireWire 800 & FireWire 400 "Fan-less" design with unique silent cooling technology Storage capacities up to 500 GB This version with 500GB Compact and sturdy aluminum enclosure