PMS Plug-in Support/Databases is 170GB!

Plex Media Server
8

You may want to verify ownership and permissions for the Plex Data Folder (or wherever you are placing the backup files).

See Linux Tips: Migration from another OS to Linux.

The pertinent lines are:
Note 1: PMS must be stopped.
Note 2: Adjust accordingly if running Plex using a different user/group or files are in a different location.

  • Change the ownership of the files to the Plex user on the Linux host.
# chown -R plex:plex "/var/lib/plexmediaserver"
  • Make certain Linux file permissions are set correctly
# find /var/lib/plexmediaserver -type d -exec chmod 755 {} \;
# find /var/lib/plexmediaserver -type f -exec chmod 644 {} \;