I have a 2-PC house and so have networked them together and shared all the devices with full devices. I need to now accommodate a 3rd PC and another person and want to limit their access to everything except for read only access to a few external hard drives and the internet. I assumed the way to do this was to include them in my work group and give them the WiFi password and then change the security settings for Everyone to either read only or nothing, assuming that Everyone meant Everyone Else that hadn't been explicitly given permission, but Everyone seemed to overwrite the specific users and groups settings and so I've changed them back. Is there a way to accomplish what I want? I realize that I can explicitly set permissions for the new person, but I have a lot of devices and would prefer not to go through it each time I add someone to the network.