The Buffalo MiniStation Air 2 is a Wifi enabled and USB connected portable hard drive which as well as mains can also be battery-powered which enables users to expand their storage capacities without the hassle of annoying wires and cables, while also being usable on the go.The hard drive has a very nice feel to it, it is a good size and feels reassuringly made, this is coupled with a 3 year warranty which always confirms quality.