Backup computer to WD MyCloud NAS using Norton Security

I have Norton Security with Backup (2015) in my laptop running Windows 8.1. I am trying to have it save the backup to my NAS (WD MyCloud), but when I go to set it up, in the "Where to Save it" section, it doesn't come up as an option.

Can I just set up my computer to back itself up during shutdown and shut off the notification from Norton Security? Is it even possible to do so?

Any ideas or suggestions would be appreciated.