Hi Nima!
We to remove the permission of writing to the members in our groups have these parameters to 0 in dotLRN File Storage Applet:
WritePermissionForMembersP set 0
InheritPermissionsForRootFolderP set 0
The parameters were added a long time ago:
http://cvs.openacs.org/cvs/openacs-4/packages/dotlrn-fs/dotlrn-fs.info?r1=1.26&r2=1.26.2.1
Greetings