Buffalo Technology TeraStation Pro II TS-HTGL/R5 - Manual (Page 45)

Advanced Settings
Group Management
Groups allow for easier management of permissions
in some networks, specifically networks with a lot of
users in different departments.
To.Delete a group, put a check next to its name and
click Delete. To add a group to your TeraStation, click
Add.
Add a name and a description to the Add New
Group fields. Put checks next to each Member User.
that you want to be part of the group. Click Apply.
when your group is set up the way you want it.
Active Directory and Domain Groups are not shown
here but are available under Share Management.
Members can be added or removed from a group
at any time by editing the group. This is done by
clicking on the Group name on the main Group
Settings.page.