Kodi 18 - 'cannot save setting' for backup location on usb

[deHakkelaar]

Terminal

xbian@avr ~ $ ps -aux | grep '[U]SER\|[k]odi.bin'
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 29981 0.0 0.2 4708 2064 ? S Feb10 0:00 sudo -u xbian -g xbian -s /usr/local/lib/kodi/kodi.bin --standalone -fs --lircdev /run/lirc/lircd
xbian 29987 80.6 46.0 1003088 352924 ? Rl Feb10 41376:37 /usr/local/lib/kodi/kodi.bin --standalone -fs --lircdev /run/lirc/lircd

As you can see from above, Kodi is started with the xbian user.
So you have to make sure the xbian user has permissions to write to that backup location.
If you change user to xbian with below one, are you able to create a file with for example the touch command on that backup location ?

Code:

sudo su - xbian