The lazy way is to have a label on your partition - my Toshiba has T4 (ext4) which I use as an extension to /home for media (Plex), pictures, music etc.
Initially I made a folder /mnt/T4 and then used gnome-disks to tell it to mount there at boot.
Systemd makes a mount and puts it on as boot - but it’s been fine for a couple of years so far, and it’s easy (if the disk fails) to replace that disk, give it the label, and mount that same location with a new device.
Later on you can set up a systemd mount which is more efficient - but basically the location can be anywhere (and I find /mnt/ to be pretty permanent). /run/media is more like a temporary mount on the fly location.