I bought this external hard disk approximately 18months before and it is so far had been very good.In these month I have use it extensively for data transfer from my laptop to pc.
With its 3.0Usb port the speed of transferring data is noticeably fast even when you use USB2.0 port of pc or laptop.
I have use it for transferring data of 300gb or more but it has never given me any problems so far.