Brand: Transcend Model                            :  Transcend StoreJet 25M3 Type                               :  External HDD Storage                         :  4TB Form Factor (Inch)   :  2.5 Inch Transcend 4 TB TS4TSJ25M3S 2.5 inch USB 3.0 HDD Portable Interface.                     :  USB 3.1 Gen 1 USB Type                     :  micro USB to USB Type A Data Transfer Rates :  Up to 5Gb/s Shockproof                 :  Yes Operating Voltage    :  5V OS Supported:  Windows 7 / 8 / 8.1 / 10, Mac OS X 10.6 or later, Linux Kernel 2.6 or later Color                  :  Iron Gray Dimension       :  129.5 x 80.8 x 24.1 mm Weight               :  294 gm Others Operating Temperature: 5 degree C - 55 degree C, Certificate: CE/FCC/BSMI/KC/RCM/EAC, Transcend StoreJet 25M3 ruggedized external 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. Transcend 4 TB TS4TSJ25M3S 2.5 inch USB 3.0 HDD Portable Part No:  TS4TSJ25M3S Warranty: 3 year