So i have been browsing for a few hours now trying to get this issue fixed but I have had no luck! I have a Seagate 320gb external hardrive. I have had it for a few months now and has worked great every single time I used it. Now suddenly it is no longer recognized. (Windows 7) I have tried doing a few things which i found throughout other topics but ran into a few problems. The HD is not shown in My Computer nor does it show in Disk Management. So I try it on a Vista machine and same results. It is not recognized anywhere not even in Device Manager. I can hear the HD spin and the green light does turn on however it used to flash consistently and now just flashes once and then remains lit. If anyone can give me some insight it would be much appreciated.