That's also what I've heard; /mnt for internal, /media for external. Most GUI apps now put removable mounts under the /run/media/$USER/ tmpfs where udisks will mount stuff privately for each user.
Strangely I don't have a /media anymore on Fedora, so maybe that convention is less popular now or was mainly an Ubuntu thing (granted, this is an Atomic spin). I definitely remember seeing it when I was running Ubuntu a while ago. The AW has a snippet for having udisks put things in /media so I'd guess this is probably a Fedora thing: < https://wiki.archlinux.org/title/Udisks#Mount_to_/media>. - Robert