Western Digital continues its momentum and offers us an upgrade of its old model to this 1.5TB 2TB model. The transfer rate USB2 and USB3 for those already equipped are excellent, it takes only a few seconds to move GB of data USB3. Also its size is minimized, and it is very quiet. The only thing we must be careful and not to move it when it is on, in effect when it is turned heads move and shock or a sudden movement can alter the data, be sure to put it out of reach of children for example.