

The command is sudo tar -cvpf ~/Desktop/retropie.tar. From the command line on your primary computer, navigate to where the 'retropie' partition is mounted (on OS X, try cd /Volumes/retropie). tar file of the main RetroPie filesystem (the 'retropie' partition). (OS X users: type diskutil list at the command line to get this easily.)

NOOBS is an easy way to set up an SD card for a Raspberry Pi.
