StoreJet 25H3 (USB 3.0) The StoreJet 25H3 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. What else can you ask for? Key Features Military-grade shock resistance* Fully Compliant with the Hi-Speed USB 2.0 specification 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 *Based on U.S. military drop-test standards MIL-STD-810G 516.6. Transcend is not responsible for recovering any data lost due to any improper usage. **Transcend Elite software is required to use this feature. Specifications Size 500GB/1TB: 131.8mm 80.8mm 19.0mm (5.27" x 3.23" x 0.76") 2TB: 131.8mm 80.8mm 24.5mm (5.27" x 3.23" x 0.98") Op. Voltage USB DC 5V Op. Temperature 5 C (41 F)~55 C (131 F) Storage Media 2.5" SATA HDD Weight 500GB/1TB: 216g (7.61oz) 2TB: 284g (10.01 oz) Certificates CE, FCC, BSMI, RCM Connection Interface USB 2.0/3.0 Power Saving Mode 10 mins One Touch Backup Yes System Requirements Desktop or notebook computer with a working USB 2.0 or USB 3.0 port Operating Systems (OS): Microsoft Windows XP Microsoft Windows Vista Microsoft Windows 7 Mi model : Transcend 2TB StoreJet (USB 3.0) Portable Hard Drive tag : External Hard Drives