Many cloud storage providers are sketchy in what level of availability they will commit to. Knowing what you can expect from your provider–and how you have to augment that–is critical. The more copies of data that you store in different parts of the cloud, the more it’s going to cost. If you’re using cloud storage as the primary destination for your backups, even with a local cache of some sort, then access to that data for recovery may be critical. Some cloud vendors are now providing a turnkey service where they will manage redundancy and connectivity for you.”]
Source: https://www.darkreading.com/database-security/how-to-choose-a-cloud-storage-provider-availability