How to organize with folders in a cycle and a set?

Hello, In cases, I have 3 folders in my cycle "25.7.2" (3 teams R&D) with tests on each one I put theses tests cases in my set & cycle "25.7.2" but in it now I have 170 tests randomly displayed without folders..It's not practical at allHow can I do to create folder in a cycle & in a set ? 

thank you