Thanks for your reply. Mhh ja i know that sd cards are not very expensive, but i would like to have it all on one card, so that i don't have to swap the cards always. So i have to store all my important files in order to format my sd card. Is there a Noobs-Package that can install the three Operating Systems Raspbian,  openelec AND recalbox?

Hi, I have already installed Raspbian and openelec via NOOBS on my raspberry PI. Now i heard of this supercool project recalbox and i wanted to ask if anybody knows if there is a possibility to install recalbox afterwards additionally to the other operating systems, or if i have to save all my work and formate my sd-card again. Thanks for your help.