Rename Partition

If the USB drive mount point under /var/media/<disklabel> changes the database files contain incorrect paths to the media and need to be updated else you will see "file not found" errors when trying to play something.

<advancedsettings>
 <pathsubstitution>
  <substitute>
    <from>/var/media/OLDNAME/SOURCE/</from>
    <to>/var/media/NEWNAME/SOURCE/</to>
  </substitute>
 </pathsubstitution>
</advancedsettings>

Path substitution ^ should work. Or you need to process the contents of the database files.

I am thinking about moving some stuff from a NAS to a locally attechted HDD... Would something like this work, too?

<advancedsettings>
<pathsubstitution>
 <substitute>
   <from>smb:some-IP/my-stupid-fritznas/soure</from>
   <to>/var/media/my-new-local-hdd/source/</to>
 </substitute>
</pathsubstitution>
</advancedsettings>

It should work.