Transcend’s StoreJet 25M3 ruggedized portable hard drive combines supreme shock-resistant qualities with the USB 3.1 Gen 1 interface, allowing for ultra-fast file transfers and the highest level of anti-shock protection. Excellent anti-shock protection The StoreJet 25M3 features a three-stage shock protection system that has passed MIL-STD-810G US military transit drop test to fully protect data stored on the drive. The three-stage shock protection system includes a silicone rubber case, an internal shock-absorbing suspension damper, and a reinforced hard casing.