Create your own Retroarch directory?

In most cases when I scan a folder, a directory doesnt create and I have to always scan content to play a game.

I plan on renaming some mame games ( tested and still works since just renaming it in retroarch ) and putting them in a directory, I just dont see any option to make a new directory within retroarch, Any tips on how?

I see some people also say you dont have to use RAs directory scanner and that theres other ones around this forum but I have yet to hunt them down, Ill keep looking but any links to that would be helpful in the meantime.