Expertise level: Easy
Account quota is set by the hosting package. Over time you may need to modify the hosting package of an individual account, whether to increase or decrease the quota.
Start by logging into WHM as root.
Open the "Account Functions" menu, and click on "Upgrade/Downgrade an Account".
Select the account, and click "Modify".
Finally, select the new package, and click "Upgrade/Downgrade".
Note that you can also modify accounts individually. To do so, please view our article on modifying an account's quota.