You are a solutions architect. Your organization is building an application hosting at the on-premise location. They would like to keep the storage on AWS. Objects/files must only be accessed via the application. As an exception, Administrators should access the objects/files directly from AWS S3 console/API bypassing the application. What solution would you provide?

Answer options:

A.Cached Volume Gateway
B.Stored Volume Gateway
C.File Gateway
D.Tape Gateway

Answer: C
The File Gateway presents a file interface that enables you to store files as objects in Amazon S3 using the industry-standard NFS and SMB file protocols, and access those files via NFS and SMB from your datacenter or Amazon EC2, or access those files as objects with the S3 API.
For option A, with Cached Volumen Gateway, you store your data in Amazon Simple Storage Service (Amazon S3) and retain a copy of frequently accessed data subsets locally. We can take incremental backups, called snapshots of the storage volume in S3.All gateway data and snapshot data for cached volumes are stored in Amazon S3 and encrypted at rest using server-side encryption (SSE). However, you can`t access this data with the Amazon S3 API or other tools such as the Amazon S3 Management Console.
For option B, with stored volumes, you store the entire set of volume data on-premises and store periodic point-in-time backups (snapshots) in AWS. In this model, your on-premises storage is primary, delivering low-latency access to your entire dataset. AWS storage is the backup that you can restore in the event of a disaster in your data center.
Option D is incorrect because the Tape Gateway enables you to replace using physical tapes on-premises with virtual tapes in AWS without changing existing backup workflows.
For more information on AWS storage gateways, refer to the documentation here.
https://docs.aws.amazon.com/storagegateway/latest/userguide/WhatIsStorageGateway.html
https://d1.awsstatic.com/whitepapers/aws-storage-gateway-file-gateway-for-hybrid-architectures.pdf
https://aws.amazon.com/storagegateway/vtl/