You can manage space restrictions of a user for a specific volume, regardless of whether the user has data on it or not.
In UMC, click Storage > User Quotas.
Search or browse the servers to list the volumes associated with them.
Select the required volumes from the list and click APPLY.
Select the user quota, click More Options icon, and then select Manage Quotas.
NOTE:If you select multiple user quotas, the More Options icon is available at the top right corner of the table.
On the MANAGE USER QUOTA page, specify the NEW QUOTA size, and click NEXT.
Review the details and click FINISH.
The new user quota is assigned to the user(s) for the selected volume(s).