New
#11
Any folder with system or administrators in the permissions will need to retain these the "authenticated users" is a catch all for remote access users and "users" are local users you will need to remove the "users" and "Authenticated users" as these will contain all user id's that exist on the system by default.
for example the everyone group on the screenshot attached would include all users and all authenticated users so to control the access this group would need to be removed. once this is done only the users you see with specific access would be able to see the file or folder
you have to be careful only to make these changes in data folders as if there is system content, (program files or DLLs (especially system files), then the results are likely to be unpredictable at best