Garage Feucht, new floor is needed, but which one?

Hello everyone,

I have a garage with a concrete foundation and a natural stone floor on top.
The natural stone floor acts like a sponge, I have high humidity and mold keeps appearing in the garage... it has to go :) But what should I put in then?

What is the proper structure of a garage?

-Strip foundation
-Gravel
-Concrete paving

or?

-Foundation
-Screed
-Tiles

or?

What would be the optimal solution?

Regards
Markus

PS: Should I drill holes under the concrete ceiling so that air can escape?

oh not all at once, I can't process that so quickly :)