My Book AV isn't recognized

I was using this on my DVR but now have cloud service so I want to use on my computer. I tried on my Windows 8 but it could not format. I also connected with the USB to a Vista computer. It said it loaded the drivers but would not show up in explorer. I would hear the “ding” when disconnecting the cable.

Hello,

Since the drives are normally on a unique file system provided by the DVR, you might need to get a third party formatting utility.

Make sure that the drive is properly connected to the computer and the power source is connected directly to the wall outlet.