Brand:Transcend Model                                       :  Transcend StoreJet 25H3P Type                                          :  External HDD Storage                                    :  4TB Form Factor (Inch)              :  2.5 Inch Interface.                                :  USB 3.0 USB Type                                :  micro USB toUSB Type A Data Transfer Rates            :  Up to 5Gb/s Transcend 4 TB Storejet 25H3P USB 3.0 HDD Portable Shockproof                            :  Yes Military-Grade Protection:  Yes Operating Voltage :  5V OS Supported         :  Windows 7 / 8 / 10, Mac OS X 10.7or later Linux Kernel 2.6.31 or later Color                           :  Purple Dimension                :  131.8 x 80.8 x 24.5mm Weight                        :  298 gm Others Certificate:  CE/ FCC/ BSMI/ KC/ RCM/ EAC Specialty  :  Drop test is based on U.S. military drop-test standards MIL-STD-810G 516.6, and performed in non-operating state, Transcend 4 TB Storejet 25H3P USB 3.0 HDD Portable Transcend Elite softwareis requiredfor One Touch Auto-backup and AES encryption functions. Warranty: 3 year