Dell 1tb portable hard disk is really cool. It has 1 tb of space that is 1000 gb of space in just one portable charger. Dell is the leading brand of hard disk as well as I had usually bought this dell 1 tb portable hard disk that is of 3.0 usb. And I store all my videos , photos , movies , ppts and back up of my phone as well as many other important files in my dell portable hard disck. It has to much fast copying of speed. It gives you 15 mps of copying speed that is really awasome. It is bit expensive but its worth of its price so buy it. One time invesement. Thank you.