The dell wil produced 1 tb external hard disk for keeping our personal data as portable or can be retrive anyware . I have bought 1 tb dell hard disk in last month . The hard disk in the 3.0 usb or camera drive version .I bought dell hard disk for keeping my personal data or anyware retriveable. The dell hard disk data retrive speed is more efficient from the other brand hard disk and it have light weight compare to other portable hardisk such as segment or lenovo . Dell serve us 1 year replacement warrenty with its portable hard disk . The hardisk reading and writting speed is upto 50 mbps.Thanks for read my review? .