Which AWS solution should the company use to meet these requirements?

Explanations:

Amazon S3 File Gateway is primarily used for file storage and does not provide the iSCSI interface needed for block storage. It enables applications to access objects in S3 via file protocols, which does not meet the company’s requirement for on-premises iSCSI storage.

AWS Storage Gateway Tape Gateway is designed for backup and archiving using virtual tapes in AWS. It is not meant for regular block storage access and does not support the iSCSI interface, making it unsuitable for the company’s application server needs.

AWS Storage Gateway Volume Gateway stored volumes provides local storage that is fully replicated to AWS, but it does not optimize for recently accessed data remaining on-premises. This option is less efficient for minimizing on-premises storage as it requires a complete local copy of the data.

AWS Storage Gateway Volume Gateway cached volumes retains frequently accessed data locally while storing the rest in AWS. This option allows the company to minimize on-premises storage requirements and keeps only the most recently accessed data locally, aligning with their goal to scale down their on-premises iSCSI storage.