NC install on RPi/Tinker with multiple HDDs


This is my first post on the forum, and also new to NC.

I have both a RPi and Tinker Board spare, and also 2 x 1TB WD Red 2.5" HDDs. I want to install most likely Raspbian and then NC on top of that.

My question: I can mount and format the two HDDs on Raspbian and create datastores on each, but how can I get NC to see the datastores on separate HDDs?