BackupBuddy is one of the most popular premium WordPress backup plugins used by over half a million WordPress sites. It allows you to easily schedule daily, weekly, and monthly backups.
With BackupBuddy, you can automatically store your backups in cloud storage services like Dropbox, Amazon S3, Rackspace Cloud, FTP, Stash (their cloud service), and even email it to yourself.
If you use their Stash service, then you also have the ability to do real-time backups.
The biggest advantage of using BackupBuddy is that it is not a subscription-based service, so there is no monthly fee. You can use the plugin on the number of websites mentioned in your plan.
You also get access to premium support forums, regular updates, and 1GB of BackupBuddy Stash storage to store your backups. In addition, their iThemes Sync feature lets you manage up to 10 WordPress site from a single dashboard.