I am disappointed because the product ordered on the 2, only 1 works ... but as one of only 2 PC we have at home. It is not recognized on! The second hard disk is recognized on any PC in the house and even on the PC work! I contacted WD (testing and supporting error report) that returns me to Amazon to exchange the faulty hard drive ... and then surprise exchange or return beyond 30 days impossible. I will go through the customer service amazon but it'll still be the obstacle course! In short only recommended product if you have a very new computer and try before 30 days! Thank you Amazon