In a previous post, I described how you can use Azure storage to store SQL Server database backup files. This flexible option offers the ability to get your critical backups off site and in certain regions, they could be configured to be automatically redundant to a secondary region. Having backups of your backups is a backup plan that I would support. Regardless of how many copies of the backups you have, you still need to be able to restore them. Restoring them routinely helps to validate that the backups are good and safe as well as ensure you have the process in place in the event you need to restore.