Click [Disk Space Settings] in the menu.

Disk Space Settings View

User Name, Disk Space, Disk Space Settings, and Deletion Setting are displayed in the list.
To edit a setting, click the link in [User Name].
Click [Disk Space Settings] to activate or inactivate the settings.

Select Group

Click "Select Group" button to open the screen for selecting a group.

Select a group and click "OK" button to show the users who belong to the group.