To modify an account's file space quota, please follow these simple steps:
1. Log in to your WHM account by visiting https://yourdomainname.com:2087 (replace "yourdomainname.com" with your actual domain name).
2. Click on "Account Functions" and then "Modify Quota."
3. Select the domain for which you wish to modify the file space quota.
4. Enter the new file space quota in megabytes.
5. Click on "Change Quota."
Congratulations! You have successfully modified the file space quota for the selected account.