Erased drive and not sure how to get it working again?

I needed to erase all my data on my passport ultra, but now I cant get anything to back up. Not sure if I need to download anything. When I tried to run back up it says its full, but when you look up under properties it empty.

Hello there,

Please check on the download section from this link, hopefully it might help you:

http://support.wdc.com/product.aspx?ID=232&lang=en