Answer: AWS Storage Gateway Volume Gateway cached volumes

## Explanation **Correct Answer: D - AWS Storage Gateway Volume Gateway cached volumes** **Why this is correct:** 1. **Cached volumes** keep only frequently accessed data locally on-premises while storing the complete dataset in Amazon S3. 2. This matches the requirement: "only its recently accessed data to remain stored locally." 3. Cached volumes help minimize the need to scale on-premises iSCSI storage because only a subset of data is stored locally. 4. The primary data store is in AWS (Amazon S3), with local storage acting as a cache. **Why other options are incorrect:** **A. Amazon S3 File Gateway** - This provides file-based access to Amazon S3 through NFS or SMB protocols, but doesn't provide iSCSI block storage access that the company needs for their application servers. **B. AWS Storage Gateway Tape Gateway** - This is for backup/archive scenarios, presenting virtual tape libraries to backup applications, not for primary storage access via iSCSI. **C. AWS Storage Gateway Volume Gateway stored volumes** - This stores the entire dataset locally on-premises and asynchronously backs it up to AWS. This would NOT minimize on-premises storage needs since all data is stored locally. **Key AWS Storage Gateway types comparison:** - **Volume Gateway (cached volumes)**: Primary data in S3, frequently accessed data cached locally - **Volume Gateway (stored volumes)**: Primary data stored locally, backed up to AWS - **File Gateway**: File-based access to S3 via NFS/SMB - **Tape Gateway**: Virtual tape library for backup applications This solution allows the company to maintain iSCSI access for their application servers while reducing their on-premises storage footprint.

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