Problem with installing addons

Some Addons work, some not.

All with info.txt are working, those who doesnt had info.txt, didnt work. I created it by my own and some addons really started to work and some still dont work.

Then I searched for help and people told me to put it in the normal garrysmod-folder (addons with two folders “models” and “materials”). I cant find them inside the game, and not not even in explorer… its like…gone…?

All Ive tried that people told me, didnt work…