The Sony company is Great and There are Sony’s Company Device, I choose this Sony HD 1 TB hard disk because this is Sony company and after bye this product I have never Problem in this hard disk one time I cant divide partition in this hard dist I call to custmber care and he tell me all that I want to say there are good service in Sony company, Speed is good and and much more then all cache memory I have this hard dist from 3 year and my experience is good with Sony HD 1 TB Hard disk.