You can easily check how much server drive space you have used through cPanel by following these steps:

1. Log in to your cPanel account (using yourdomain.com/cpanel or yourdomain.com:2082)
2. Under the "Files" section select Disk Space Usage.
3. A graph displaying your disk usage will be displayed along with a breakdown of your files.

The information provided may be up to 4 hours old.