In order to give members of your group
change permissions in Windows, you must give at least rxwrwx--- to that file. That is, execution permissions on that file.
The best solution to get the correct permissions for all group members is to create a directory, and set the
setgid bit on that directory. Then every file in that directory will inherit the permissions from that directory when it is created.
It is by far the easiest solution for such a shared drive.
You set the
setgid bit by:
The directory shows up like
drwxrwS---
Note the lower case 's' . An capital 'S' means rwxrw---- (without 'X') on the directory. A lower case 's' means rwxrwx---
plus 's'
jlinkels