Don't know what is happening but i have lost my backup drive in my computer. The system should read C: , D:, And E:. E drive is dvd burner. C: is main drive and D is my back up drive. D has disappeared from Windows. It shows in my Bios right where its supposed to be but disappears in windows. Any ideas as to what to do. I unplugged the drive while system was on. Both drives are ssd. They are both sata. Unplug and wait for around 5 minutes and plug it back in and nothing. I have made sure the power is plugged in and i tried a different sata cord in it. All my saved games, music and pictures along with files i didn't want to lose is on that drive. can't understand why it shows on Bios but not windows.