Create a new IAM role, establish a new backup plan, utilize the new IAM role for creating backups, update the KMS key policy to grant the new IAM role access to the key, and implement an hourly backup schedule for the file system.

Develop a new backup plan, update the KMS key policy to permit the AWSServiceRoleForBackup IAM role to use the key, and configure a custom cron expression to execute a backup of the file system every 30 minutes.

Generate a new IAM role, apply the existing backup plan, update the KMS key policy to enable the new IAM role to use the key, and activate continuous backups for point-in-time recovery.

Employ the existing backup plan, update the KMS key policy to allow the AWSServiceRoleForBackup IAM role to use the key, and enable Cross-Region Replication for the file system.