I needed a way to have all my media on the media server. I was able to do this by adding a usb to one of the servers then passing in the USB from the host server to the guest VM. This was pretty straight forward. The device was a Western Digital.
lsusb | grep WD
The result is
Bus 002 Device 013: ID 058f:6387 Western Digital (WD)
Assign it to the VM by:
qm set 804 -usb0 host=058f:6387,usb3=yes
Now the one thing I noticed I had to do before shutting down and starting the VM again was ensure the usb3 was clicked. I guess this was because both devices only supported usb3.