COB storage allowance

I can’t seem to find any info on the amount of storage allowed by the free COB. Any help? Also, I came across a paid version. What’s the difference? 88)

free is 2gb.

Paid
Comodo Online Backup is available in the following
base pricing plans:

Standard Plan Monthly
$4.95 per month
10 GB Storage Space
Additional storage available @ $1 per month for 2 GB *
Sign Up Now

Standard Plan Annual
$50.00 per year
10 GB Storage Space
Additional storage available @ $10 per year for 2 GB *
Sign Up Now

Home User Plan
$12.00 per year
1 GB Storage Space
Additional storage available @ $10 per year for 2 GB *
Sign Up Now

From http://www.comodo.com/home/data-storage-encryption/online-backup.php