I have a seagate 500GB hard in my laptop that doesn't let you copy things to the hard drive. It starts and stops, but usually I have to start over. Small things copy to it, but big items like videos and large amount of files in a folder will not copy. The hp s.m.a.r.t error 301 pops up, but when I ran error check it said that everything was fine. I'm actually using the laptop now. Can someone tell me what is going on? Is there a way to fix this?