Linkstation access restrictions (Domain Groups/Users)

[effefftee]

   

I'm hoping this is a silly question, something I've overlooked.. but basically..

 

My linkstation is joined to the domain and shared folders are accessible, however I want to create one folder thats Read Only by default, then add a group of users from AD that have read/write access.

 

As it stands, I can only seem to provide read/write access to all, then restrict certain users/groups to read only.  It's backwards!

 

any ideas?