Capacity            1 TB  2 TB   250GB (SSD)   500GB (SSD)                                
Interface            1x Thunderbolt™ port
                          1x USB 3.0 port (UAS and USB 2.0* compatible)
Speed                Thunderbolt: 10 Gb/s  USB 3.0: 5 Gb/s USB 2.0: 480Mb/s
System Req.      Computer with a Thunderbolt, USB 3.0, 
                           or USB 2.0 port.
                           Thunderbolt: Latest Windows 7, Windows 8, 
                           Mac OS X 10.6 or greater
                           USB 3.0: Latest Windows XP, Windows Vista, 
                           Windows 7, Windows 8, or 
                           Mac OS X 10.5 (Intel Only) or later
Dimensions        2.3 x 6.6 x 7.2 in.    
Weight               0.8 lb
P-N                    9000488 / 9000489 / 9000490 / 9000491