Adding an additional external drive to my plex server

I am using a laptop for my plex server and my contents is on an external hard drive.
I am running out of space and wondering how do I add another external drive to my
plex for more storage?

Thanks

You can add multiple file paths for a library. Hit the browse for media folder button and navigate to add the folder on the new drive that has the stuff for that library.

( do not put stuff on the root of the drive)

You may have to stop and restart the server software, after plugging in the drive.
(At least on Windows)