How to backup Appian Cloud

We have annual security audits in our company. This year Appian entered in this process and the auditor is consulting us about backups. We have contracted the Essential cloud service. We understand that Appian has some sort of solution (cluster) on top of cloud environments. Where can I find this documentation? Is there a recommended procedure by Appian to backup our information? How can I ensure that in the event of an event I can recover our productive environment?

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