Thanks for the help guys.
Now I have to make a hugely embarrassing admission... I'm actually using an RPI 3.
I had an XU4, and bought it with the intention of using it for my NAS, but ended up using the RPI for some reason. I only remembered when I went in to check the box a few minutes ago.
I'm an idiot
If anyone feels like helping a simpleton like me with an issue with a Pi instead of an XU4, is greatly appreciate it.