Sony external hard drive is good working on Initial time after 10 times of use its transfer speed got slow and giving some errors.Sony is the good branded and trustworthy once upon a time but nowadays not that good like before.Even we paid little bit of extra money for the brands but its not worth for that Money.So friends you do not expect more from sony especially in Hard drive Purchase.Think some unbranded or something at cheeper rate, if its not working we can change another but costly like sony we cant do .so think and buy Sony.