A company runs a Windows Server application on VMware vSphere on premises. The application reads data in a proprietary format that the application itself must interpret. Servers are manually provisioned. As part of the disaster recovery (DR) plan, the company wants to be able to run the application temporarily on AWS if the on-premises environment fails, and then return the application to on-premises after recovery. The recovery point objective (RPO) is 5 minutes. Which solution provides DR capability on AWS with the LEAST operational overhead?

AWS Elastic Disaster Recovery (DRS) is the most suitable solution because it provides continuous block-level replication of entire servers, including the operating system, applications, and data, from on-premises to AWS. This ensures a low RPO (5 minutes in this case) and simplifies the recovery process by allowing direct launch of EC2 instances from the replicated data with minimal operational overhead. AWS DataSync replicates data, not entire server states, requiring manual EC2 instance deployment and application configuration. AWS Storage Gateway with S3 and AWS Backup is a backup and restore solution, not continuous replication for low RPO DR. Amazon FSx for Windows File Server is for file storage, not server replication, and would require significant manual effort to rebuild the application environment.