Transcend 1 TB StoreJet M3 Military Drop Tested USB 3.0 External Hard Drive Military-grade shock resistance, SuperSpeed USB 3.0 compliant and backwards compatible with USB 2.0 Advanced 3-stage shock protection system, Durable anti-shock rubber outer case Advanced internal hard drive suspension system, Quick Reconnect Button - re-enable safely removed USB hard drive without unplug and reinsert One Touch Auto-Backup button, 256-bit AES file & folder encryption, Exclusive Transcend Elite data management software