SMB, I believe - not 100% sure how to tell. I did read through the * Mounting CIFS + SMB network shares for Plex use link
But what I’m not understanding is the link between my nas admin account that are stored in the credentials file, and the plex user in the mounting (uid=999).
I added / edited the fstab file manually - here is what I added:
# Mounting Network Directory for Plex
//192.168.50.40/Movies_TV /home/ripper/plex/ cifs uid=999,gid=999,credentials=/var/lib/plexmediaserver/.mountaccess,iocharset=utf8 0 0`Preformatted text`