Yes, the module supports the Usage Update function of WHMCS.
The WHMCS UsageUpdate function performs a daily import of disk and bandwidth usage (traffic) for accounts on a server. The imported data is then used to display usage statistics in both the customer and admin areas of WHMCS. The data is also used to calculate disk and bandwidth usage (traffic) when enabled for a product.
This gives you the ability to bill your customers for the actual disk space and traffic used.