My opinion was sony is best company but cost is too much. Sony is very famous brand in gadgets. Its 1TB storage space. Its data transfer speed is very fast. Its usb3.0 transfer speed is 5gbps and usb 2.0 transfer speed is 500mbps.it is very good transfer speed. It is supported all type of window. Its design is good.it is very slim. Its performance is good. Sony gives the good service and its price is also affortable. It is value for money product.