I bought Dell 1Tb hard disk from online. Performance wise it is soo poor . though it comes it USb.3.0 the data transfer is so slow. The blinking blue light shows indication for data transfer. It geeting heat up and motor vibration. It is made up of very delicate china plastic and so what heavy. After two weeks it stopped working . service is so poor I got connected with customer care rep after three days and they said technician wiil be on the way. Its been a week but no no arrived. It not worth for that price I dont recommendm this product.