SOLVED: jellyfin does not have permission to access the drive my movies are stored on?

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So "su -" will just make you root. What I was trying to figure out is whether you can create a file on the shares using the touch command *as the jellyfin user*. A "service user" is just a user on your install whose only purpose is to run a service -- in this case, Jellyfin. You generally don't login with them and should be able to run commands as them when elevated to root, but that doesn't seem to be working.

I might be a bit out of my depth on this one, but let me simmer for a bit and maybe somebody else will have an idea in the meantime.