I have been having problems with my Seagate HDD so I ordered a WD drive to replace it. Arrived today, started to transfer files over, immediately ran into issues. The folder would begin transfering then suddenly, the speed would shoot right down and just stop. It would pick up again but then stop again. This carries on till the transfer is done, unless there's a lot to do then it'll just crash. I tried it with another system and it worked just fine on there. I tried other ports on my main system and no go. This is the only HDD that's ever done this and if it works on the other system, what's going on?