MozyHome Free offers 2GB for free. That is a great start to protecting all of your important files. Eventually though you will want to upgrade to the full version of MozyHome Unlimited. The problem is, since you already have a Mozy account there is no place to enter a promotional code in the upgrade form.
Currently there is no way to use a promotional code on an upgrade from MozyHome Free. The only work around is to sign up again using a different email address and use the promotional code with the new sign up. While this is not an ideal situation knowing ahead of time can help. Here are a couple of things you might want to consider.
When signing up for a MozyHome Free account create a new free email account at Yahoo, GMail or Hotmail. That way when you want to upgrade to MozyHome Unlimited you can use your regular email address.
Be prepared to re-upload the 2GB of data that you had uploaded with MozyHome Free. This is a not a huge amount of data, so it should not take to long to do it over again.
When you are ready to sign up for MozyHome Unlimited be sure to visit MozyPromotionalCode.com for the latest Mozy Coupons and Promotional Codes.
