I am having massive problems with moving my system to a bigger card (8GB -> 32 GB). raspi-config extending filesystem doesn't work with NOOBS, I tried gparted where I couldn't re-size my partition due to an unused (2mb) space attached to it.
doing it manually gives me an error when I perform a write operation at the end of the process. After a reboot the system boots to the installation screen - so I assume something goes wrong there. Is there any way to re-size the SD card with NOOBS installed on it ?