Stop Job Is Running for Plex Media Server

No. I don’t edit fstab - for a quick easy GUI way I use gnome-disks.
For a permanent way I do systemd mounting.

Something like this:
sudo touch /etc/systemd/system/mnt-T3.mount

For my ext4 formatted 3TB Toshiba:

> [Unit]
> Description=Mount Toshiba 3TB (/mnt/T3)
>
> [Mount]
> What=/dev/disk/by-label/T3
> Where=/mnt/T3
> Type=ext4
> Options=nosuid,nodev,nofail,x-gvfs-show
> TimeoutSec=15seconds
>
> [Install]
> WantedBy=multi-user.target