A customer implemented AWS Storage Gateway with a gateway-cached volume at their main office. You need to restore the Storage Gateway data in AWS. How would you implement this?

Answer options:

A.Use an HTTPS GET to the Amazon S3 bucket where the files are located.
B.Restore by implementing a lifecycle policy on the Amazon S3 bucket.
C.Make an Amazon Glacier Restore API call to load the files into another Amazon S3 bucket within four to six hours.
D.Create an Amazon EBS volume from a gateway snapshot and mount it to an Amazon EC2 instance.

Answers - D
Option A is incorrect because all gateway-cached volume data and snapshot data are stored in Amazon S3 encrypted at rest using server-side encryption (SSE) and cannot be visible or accessed with S3 API or any other tools. (Ref: https://forums.aws.amazon.com/thread.jspa?threadID=109748)
Option B is incorrect because the lifecycle policy does not help to restore the data.
Option C is incorrect because the cached volumes are never stored in Glacier.
Option D is CORRECT because you can take point-in-time snapshots of gateway volumes made available in the form of Amazon EBS snapshots. A new EBS volume can be created from the snapshot which can be mounted to an existing EC2 instance.
For more information on this topic, please refer to the AWS FAQs.
https://aws.amazon.com/storagegateway/faqs/