I am trying to customize sub folder, which I understand fully from below 

However I want to copy permissions, so for example we have a folder for every new supplier of ours. 

In this folder there are 4 sub folder, but I dont want to give access to 2 of these sub folders to an external user. 

I can do it one time, but we make new folders for new suppliers every day so I want these permissions transferred whenever I copy a folder for a new supplier