Most files occupy slightly more disk space than their actual size. For example, a 300-byte file may occupy 4 KB of actual disk space. As a result, some discrepancies may exist between data that cPanel's File Manager interface (Home >> Files >> File Manager) and the Disk Space Usage interface display.
The disk space usage information does not indicate how much space the directory itself uses. Typically, directories themselves occupy a negligible amount of disk space.
The system includes MySQL® database size and PostgreSQL® database size in an account’s disk usage calculation. However, the system does not enforce the account’s disk space quota limit if a database’s size causes the account to exceeds its limit. For more information, read our Quota Modification documentation.
The figures that the Disk Space Usage interface displays may not reflect recent changes in your account's disk space.