After reading around, this seems to be very common problem, so i think every SIII and NOTE II will eventually kill sd card. Weird is the fact that most cards are Sandisk 32GB+; mine is 1.5 months old and worked perfect untill few hours ago. Even more interesting is the fact that i havent seen one Samung sdcard complaint. Maybe that's just a coincidence as most normal cards sold are probably by sandisk.
Anyway i did full format, so it will be done soon and I will report if the problem reoccurs. Any other ideas I could try with sdcard to make it work?