Lately, many enterprises have been exposed to piracy, especially ransomware. Without having a backup of your storage, your data might be encrypted, and you will have to either pay to get it decrypted, or you will never see it again. That is why considering Azure Backup as a part of you design will be very beneficial to keeping your application highly available.
Further details about Azure Backup will be covered in Chapter 8, Extending Your Azure Storage Management.