I use a Windows free tool called FastGlacier. I set up an IAM user on my AWS account for my backups, and use those creds to login. Then it's drag and drop! You can even use FastGlacier to encrypt/decrypt on the fly as you upload and download.

Glacier is cheap because the retrieval times are very slow - something like 1-12 hours depending on the tier.

I have about 100GB of critical data. Personal documents, photos and some music I don't want to have to search for if the house burns down. It's something like a dollar a month. Less than a cup of coffee.