Main folder name: Thecompany ............ everybody should have access
subfolders as depts like : Finance--------------everybody should have access for listing
HR --------------------everybody should have access for listing
IT---------------------everybody should have access for listing
and inside subfolders there are some other subfolders example in Finance dept folder
Finance
aaaa -----------this folder should have access for everybody including fullcontrol
bbbb------------only finance people have access on this folder including fullcontrol
and so on....