Silicon Power Rugged Armor A80 500 GB 2.5-Inch USB 3.0 and USB 2.0 Military Grade Portable External Hard Drive SP500GBPHDA80S3B (Blue) Rugged portable hard drive is IPX7 waterproof, dust-proof, pressure-proof, and drop-proof up to about 4 feet 500GB capacity stores 244,000 photos, 122,000 MP3s, 24,400 data files, or 220 hours DVD-quality video USB 3.0 interface provides data transfer speeds up to 5 Gbps (backwards compatible with USB 2.0) Handy cable-carry design; plug-and-play hard drive is powered via USB bus, no adapters/drivers necessary Three-year manufacturer's warranty