Amazon S3 is a great and cheap place to keep your SQL Server database backups.

SQLBackupAndFTP starting from the Standard version now allows you  to backup SQL Server databases to Amazon S3 directly.

To set up the backups you need to have your Access Key and Secret Key that you can find under “Security Credentials” in Amazon Web Services: https://aws-portal.amazon.com/gp/aws/securityCredentials#access_credentials