OWC 1.0TB Mercury On-The-Go Pro, USB 3.0/2.0 Storage Solution, 5400 RPM (OWCMSU35S1GB8) 1.0TB, 5400 RPM, Portable, Bus-Powered Storage Solution Max Data Transfer Rate: USB 3.0  500MB/s, USB 2.0  60MB/s USB 3.0 & 2.0 Storage Solution, Mac and PC compatible Connection Cable sand Carrying Case included OWC 3 Year Solution Warranty <span class="a-text-bold">USB 3.0</span>: Supported on Macs and PC&#039;s meeting minimum requirements. <span class="a-text-bold">USB 2.0</span>: Supported on Macs and PC&#039;s meeting minimum requirements. <span class="a-text-bold">Macintosh:</span> Macintosh OS 8.6 to 9.2.2, OS X 10.2.x or later including &#039;Mavericks&#039; 10.9.x, and an available USB 3.0 port. Time Machine Compatible: Mac OS X 10.5(version introduced) and later. <span class="a-text-bold">PC:</span> Windows Vista, XP, 2000, NT, 98, and an available USB 3.0 port. <span class="a-text-bold">Linux:</span> Linux compatible via supported the USB interface. Bus power via USB on most computers with factory installed USB 2.0 or USB 3.0 port. Optional AC Adapter* (available as a separate purchase) * AC adapter not required for most applications provided computer bus supplies appropriate power needs. USB 3.0  500MB/s USB 2.0  60MB/s 3.5&#034; (W) x 5.5&#034; (D) x 1&#034; (H) 88.9mm x 139.7mm x 25.4mm 0.64lbs. (0.30kg)