Disk Space is "Unmetered" which means you will not be charge according to the amount of disk space you use.
However, we do require all customers to be fully compliant with our Terms of Service and only utilize disk storage in the normal operation of a small business website.
If your account's disk space exceed usage, you will receive an email asking you to reduce usage/change to higher hosting plan or you will be charge for used resources.
Customer who is managing a personal or small business website very rare exceed our usage policies.