The configuration change in /etc/fstab is what stopped it being mounted correctly on boot. But is what was recommended for the SMB share.
I’m not sure I understand why it changes from MNT to Media based on the GUI’s changes to the drive. If I have it auto-mount, it adds a 2nd listing like this:
<span style="color:#323232;">//192.168.0.30/share /mnt/2666EE3966EE097F auto cifs username=user,password=1 0 0
</span><span style="color:#323232;">/dev/disk/by-uuid/2666EE3966EE097F /mnt/2666EE3966EE097F auto nosuid,nodev,nofail,x-gvfs-show 0 0
</span>