Join Date:Joined: May 2010
If you back everything up that you want to keep from your installation and from your internal "SD", you can use Odin on your PC to flash the stock ND8 tar (in development, not original development), then your phone will be upgraded.
It will wipe everything but your external SD.
Sent from my Sprint Samsung Galaxy SIII with M.O.A.R. v9.0, dkp kernel dated 3/20/2014 and TWRP v126.96.36.199.