SimpleDrive enables workgroups and businesses to store files and automatically backup data to a secure off-site system accessible from any internet connected computer.
Each account costs $25/mo and includes 20GB of storage. Additional storage beyond the original 20GB is available for 75¢ per GB.
That means if you have 19GB of files on your SimpleDrive you'll pay $25.
If you have 30GB of files on your SimpleDrive you'll pay $32.50, thats $25 for 20GB plus $7.50 for the additional 10GB.