Not sure this is the right place to ask, maybe it's a dumb question too but i have to know, i tried to search for aswers but found nothing:
During the years i made a lot of families ready to be placed in empty or abandoned homes, that are made by sims not saved in Cas (or it will take hours to load) But i realized just today that i don't know in which folder those families are stored and i need to backup them on dvd (just to be provident)
I know Cas sims are in "SavedSim" folder, but i don't know where the Edit Town families are saved.
If something goes wrong with the Pc i will lose dozens of family: i'm scared

They are (including your saved houses and other buildings lots) saved in Library folder inside your TS3 Documents folder

Thank you very much :D