A company needs fully managed, highly reliable, and scalable file storage that is accessible over the Server Message Block (SMB) protocol. Which AWS service will meet these requirements?

Amazon FSx for Windows File Server is a fully managed file storage service built on Windows Server. It is specifically designed to provide highly reliable and scalable file storage that is accessible via the Server Message Block (SMB) protocol. This makes it the ideal choice for applications and workloads that require a native Windows file system and SMB-based shared storage.

A. Amazon S3 is an object storage service accessed via APIs or HTTP/S. It does not natively support the SMB protocol for file system access.
B. Amazon Elastic File System (Amazon EFS) is a scalable file storage service, but it uses the Network File System (NFS) protocol, not SMB.
D. Amazon Elastic Block Store (Amazon EBS) provides block-level storage volumes for use with EC2 instances. It is not a shared file storage service accessible via SMB.

1. Amazon FSx for Windows File Server, "What is Amazon FSx for Windows File Server?", AWS Documentation. Retrieved from: https://docs.aws.amazon.com/fsx/latest/WindowsGuide/what-is-fsx-windows.html (The first paragraph states it provides "fully managed Microsoft Windows file servers, backed by a fully native Windows file system" and is "accessible from your Windows... instances via the industry-standard Server Message Block (SMB) protocol.")

2. Amazon EFS, "Amazon EFS: How it works", AWS Documentation. Retrieved from: https://docs.aws.amazon.com/efs/latest/ug/how-it-works.html (This document specifies that Amazon EFS "provides file system access semantics (such as strong data consistency and file locking) and supports the Network File System (NFS) version 4 (NFSv4.1 and NFSv4.0) protocol.")

3. AWS Storage Services, "Cloud File Storage", AWS Official Website. Retrieved from: https://aws.amazon.com/products/storage/file-storage/ (This page compares EFS and FSx, clearly stating FSx for Windows File Server is for "SMB-based file storage".)