You can use the Edit Limits dialog box to modify the disk space threshold; the hard and soft limits on the amount of disk space that the quota target can use; and the hard and soft limits on the number of files that the quota target can own.
Steps
1.
From the Home tab, double-click the appropriate storage system.
2.
In the navigation pane, click Storage > Quotas.
3.
Select the quota that you want to edit and click Edit Limits.
4.
Modify the quota settings as required.
5.
Click Save and Close to save your changes and close the dialog box.
6.
Verify the changes that you made to the selected quota in the User Defined Quotas tab.