Neverrazor :
follow this
1-right click on my computer
2-select manage
3-select disk manger
4-disk mangement
you should see your main drive and external drive there if not then we have a proplem
i so far have the same problem, i'm trying to help out a friend, so it's been used on multiple computers. it's a seagate freeagent go 500 gig though. it doesn't show in disk manager or device manager, or in bios. light turns on, i can feel the hd spinning up (but not loudly or with excessive vibration). friend says it was working fine, then went to plug it in to use it and now it won't show up on the computer. is it busted or what?