Sony is a leading industry in the field od technology and gadgets. Sony 1 tb wired external hard disk is one of the best hard disk . It is small in size so it is easy to carry . It also directly connected to the mobile phone also . It does not show the heatting effect and it also work properly for long time also . The edge of this is curved so that it look good . Over it is as good as it cost for it , if you may want hard disk you should buy this one