I have buyied this WD passport Ultra 1TB few months ago only . It was well built and was great to use . Its small size is the best part that makes it cool from the others hard drives . The data exchange speed is about 45-50 megabyte per second . The company also gives a USB 3.0 which makes the speed of transfer more better .It stores 1Tb data which is enough for a user . I would recommend everyone who are looking for a great hard drive .