The only guaranteed path to recovery after a ransomware attack is having backup storage with Absolute Immutability.
This means no one, not even the most privileged admin or attacker with access to backup storage, can modify or delete data.
Absolute Immutability can only be achieved using a backup storage system that is “secure-by-design” with Zero Access to perform destructive actions, and this Zero Access must be verifiable with third party testing. S3 object storage is the only way to achieve this.