I just bought a seagate 300 GB external HD and it was working well for the past two weeks until now. My computer does not recognize it at all. Under the safely remove hardware, I don't see it show up at all. I tried my other external HD and it work out fine. I am using window xp and service pack 2. I'm not sure wat the problem also. I tried rebooting and also my comp does not recognize it. I also tried on my friend's pc and the same thing happen.