Hello, i just got my NEW HDD, from Seagate 750 GB, 7200RPM! but it makes some weird noises when i open stuff, close or even install sometimes! i called the store that i've purchased it and they said it's fine to make the sounds it makes becuase that's how their system works, and the only reason i changed my old hdd is becuase of these noises, it even did less noise than these, but it was also slowing down, slow copy pasting etc.. so even if it didn't make these noises i would have gotten a new one! so i want any answers to this, is this fine that it makes these kind of sounds very often or?