A company runs an SMB file server in its data center. The server stores large files that are frequently accessed for up to 7 days after creation. After 7 days, the files must still be accessible with a maximum retrieval time of 24 hours. Which solution meets these requirements?

The correct solution uses an Amazon S3 File Gateway to provide an SMB interface to Amazon S3, allowing the existing file server to seamlessly store data in AWS. An S3 Lifecycle policy then transitions data older than 7 days to S3 Glacier Deep Archive. This meets the requirement for files to be accessible for up to 7 days (in S3 Standard via the gateway) and then accessible with a maximum retrieval time of 24 hours (S3 Glacier Deep Archive's standard retrieval time). AWS DataSync is for transferring data, not for providing an SMB interface or lifecycle management. An Amazon FSx File Gateway integrates with Amazon FSx for Windows File Server, not directly with S3 for lifecycle management to Glacier Deep Archive. Providing users direct S3 access bypasses the existing SMB file server and requires application changes. S3 Glacier Flexible Retrieval has a maximum retrieval time of 12 hours, which is faster than the 24-hour requirement, but Deep Archive is more cost-effective for the specified retrieval time.