The StoreJet 25H3P USB 3.0 portable hard drive combines the superior performance of USB 3.0, vast storage space, eye-catching enclosure, and a three-stage shock protection system that meets U.S. military drop-test standards. - USB 3.0 and USB 2.0 connection options - Military-grade shock resistance - Advanced 3-stage shock protection system - Quick Reconnect Button - re-enable safely removed USB hard drive without unplug and reinsert