MidGard0898:
i've been going arround the code for a while now and i can't find the problem... probably it's right in front of my eyes and i cant see it...
Ditch all the crap that has nothing to do with the SD card. You don't need to include RTClib, Wire.h, LiquidCrystal, etc. And do NOT create instances of them.
Have you tried the examples that come with the SD class?