I was the first few months very pleased with the hard drive. Meanwhile, the ominous clunk has with me but set (the reading arm moves loudly for no reason often in the park position). Since I use the hard drive in the notebook, the clicking can be heard really loud. Sometimes it's not there, sometimes all day. Actually, I'm not sensitive terms which Betriebstgeräusche of devices, but this does not bother clack only enormous, but sounds extremely unhealthy. Since no error on the hard disk are detected by tests, one has what the warranty terms certainly no chance (Samsung calls it clacking normal). Since the hard drive now but sometimes does not respond immediately when they clacks, I simply fear for my data. I'm going to buy another hard drive - and never again a Samsung. This is a - obviously more often occurring - behavior that you do not have to accept a hard drive. I do not recommend the purchase.