Verbatim 2TB 2.5' USB3 Black Backup Software, Compatible with USB 2.0; Up to 640MBps; 2YR WTY (LS) Features and Benefits: Sleek, lightweight portable drive USB 3.0 increases transfer speed up to 10x faster than USB 2.0 Backwardly compatible with USB 2.0 ports Includes Nero BackItUp Burn software* Energy saving software, allowing you to suspend the hard drive from spinning while not in use, increasing efficiency and saving energy Verbatim 2 Year Limited Warranty *Software compatible with windows operating systems only Drive Performance Maximum External Data Transfer Rate:640 MBps (5 Gbps) Rotational Speed:5400 rpm Buffer:8 MB BUS powered:Yes System Requirements USB 3.0 or USB 2.0 port Windows 2000, XP, Vista or Windows 7 Mac OS X 10.0 or higher