Seagate Expansion 4TB External HDD - USB 3.0 for Windows and Mac with 3 yr Data Recovery Services, Portable Hard Drive (STKM4000400)Brand Seagate Manufacturer Seagate Technology (Thailand) Limited. India Customer Care No: 18003092525, Seagate Colour Black Form Factor 2. 5 inch Item Height 29. 72 Centimeters Item Width 3. 81 Centimeters Product Dimensions 20. 32 x 3. 81 x 29. 72 cm; 181. 44 g Batteries 1 Lithium Ion batteries required. Item model number STKM4000400 Computer Memory Type DIMM Hard Drive Size 4 TB Hard Disk Description Mechanical Hard Disk Hard Drive Interface USB 2.