I had purchased seagate external 1 TB hard disk 4 months before.It is written that the HDD is 3.0 USB.But when I have used it it shows only 10 mbps speed of copying which is not like 3.0 USB I think company cheated with me because the copy speed must above 30 mbps which is greater than now I am facing.This product is not providing me a such value that it proves. from my side donot purchase this item