SpecificationsMfr Part Number: ST3U56S12K(SZ)Features:Affordable, high performance USB 3.0 driveUSB powered - no external power is requiredFully compatible with USB 3.0 and USB 2.0 (with some of the fastest USB 2.0 scores)Capacity: 256 GBInterface: USB 3.0Performance:Sequential Read Rate: 185 MB/sSequential Write Rate: 63 MB/sOperating Shock: 1500GOperating Vibration: 16GOperating Temperature: 0oC to 70oCError Correction: Built in ECC and bad block managementColor: BlackOS Support: Windows 7/ Vista/ XP, Mac OSXDimensions: 70.3 x 21.0 x 10.0 mm