Man, i know nothing about Linux, so i think i will just leave this backup away and download my roms, there aren't many roms anyway, so no problem with that.
Would like to thank everyone, my retropie is running perfectly now:
@mitu
@jonnykesh
@markyh444
@Sano
@chipsnblip
@BuZz
Dont know what is more awesome, raspberry/retropie itself or its community :)