/mnt/user/immich-photos/ , and /mnt/user/immich-photos-old/ . /immich-photos-old/ linked as an external library in the immich UI, but everything that's in /immich-photos-old/ is also in /immich-photos/. I attempted to clean this up by removing the External Library from the UI, but I didn't realize that the database appears not to be aware of ~330GB which are sitting in the /immich-photos/ folder but "orphaned" from the database.