D-Link ShareCenter DNS-340L User Manual page 156

Section 4 - Configuration
Select the group you want to modify. Your selection will turn red.
Click Modify.
The Group Quota Settings screen will display the group you want to
modify. Enter a new quota amount for each volume for the current group
and click Apply.
The modified quota settings will be displayed in the Group Quota Settings
table.
D-Link ShareCenter DNS-340L User Manual 154