Mozy is a simple and economical way to protect your data. They were just purchased by Carbonite, so this program is no longer available.
If you have Mozy FREE then you should sign up for a new Carbonite account for $72/year.
If you have Mozy PAID, then you will be upgraded to unlimited space for $72/year. You can follow the directions on the email they sent, or you can click here and sign up for a new plan.