I have added an SSD to my computer that hosts Jellyfin where I want to have my Shows and Movies folders. When I go to add them to my library I get the following error:

The path could not be found. Please ensure the path is valid and try again.

So the path I had entered was /media/RVAtom/SSD. SSD is the name of the drive, and it was not offered as a choice by Jellyfin, I typed the SSD part myself.

I get the impression by reading some stuff that I either need to mount the drive at each reboot, or give jellyfin permission to read (or read and write?) that drive, but I am not sure how to go about that.