Hi I used my seagate 500GB portable hard drive to use the Mac time machine and it said that the hard drive needed to be reformatted so i did. But i didn't realize i then couldn't use it as a normal hard drive. So i then plugged it in to my windows pc and it doesn't open but does register in the bottom tab that the USB in plugged in and says it is working properly. I cant use it for open any file on my PC or no auto run. How do now stop it as a time machine hard drive and use as a normal hard drive??? And get rid of time machine from the hard drive altogether ??