LaCie Rugged All-Terrain 500 GB FireWire 800/ FireWire 400/USB 2.0 Portable External Hard Drive 301371 Measures 3.5 x 1.0 x 5.7 inches (WxHxD); backed by a 3-year warranty Triple interface including FireWire 800, FireWire 400, and USB 2.0 for speed and universal connectivity 500 GB external hard disk with rugged, shock resistant case Bus-powered so no bulky power adapter required 500 GB external hard disk with rugged, shock resistant case Triple interface including FireWire 800, FireWire 400, and USB 2.0 for speed and universal connectivity Bus-powered so no bulky power adapter required Measures 3.5 x 1.0 x 5.7 inches (WxHxD); backed by a 3-year warranty