1.5 TB My Book wont go to new computer

I had it running on an XP OS. I plugged into a Windows 8 to download drivers. It did, now my computer will not find it anywhere. Any ideas to release my data?


Just for testing purposes please try on another computer, one with Windows vista or 7 to verify if it is seen. You may also try updating the firmware on the drive. What is the model number on your drive?

If the drive does show on another PC I would copy the data before trying the firmware update.