If you have not already, login to the WebControlCenter at https://www.webcontrolcenter.com/customer.aspx
Disk Usage History
From the menu, access STATISTICS
< WEB SITE DISK USAGE HISTORY
The Web Site Disk Usage History will show the total amount of disk space used by files on the
website per day for any particular calendar month.
To view the disk
space for your web site, select the domain (if applicable) and date from the
drop-down menus and click on the GO
In the WebControlCenter under the MENU, there is a STATS table containing an overview of your average stats. The table lists Bandwidth, Disk Space, and Mail Space usage.
The average disk space usage is a daily total averaged out for the current calendar month.