Which AWS Service Provides a Managed SMB File Server for Windows?

Why the Answer Is Correct

Amazon FSx for Windows File Server is a fully managed native Microsoft Windows file system that is built on Windows Server and supports the Server Message Block (SMB) protocol. It integrates with Microsoft Active Directory, Windows access control lists, DFS namespaces, and shadow copies, so it directly matches the requirement for a file server that natively supports Microsoft workloads and file systems. Choosing C satisfies both the "fully managed" and "SMB" parts of the scenario in one service, which is exactly what the question asks. The community is unanimous here: Aghajee noted that it is "built on Windows Server" and supports SMB, while BShelat and petercorn both pointed to the official AWS FSx for Windows page. No other option provides a managed Windows file server endpoint with native SMB support.

Why the Other Options Are Wrong

Amazon EFS is a fully managed file system, but it implements the NFS protocol and is optimized for Linux-based workloads, so it does not natively serve SMB shares or Windows file-system features. Amazon FSx for Lustre is designed for high-performance computing and Linux POSIX workloads, and it does not provide native SMB or Windows Server integration. Amazon EBS provides block-level storage volumes for EC2 instances, not a managed file server; a company would have to build and manage its own Windows file server on top of EBS, which fails the "fully managed file server" requirement. Each wrong option fails at least one explicit criterion, while FSx for Windows File Server satisfies all of them.

Community Comment Notes

Every recorded vote on this question selected C, and the comments reinforce the same reasoning rather than adding any dispute. BShelat and petercorn both shared the AWS FSx for Windows page as supporting evidence, and petercorn emphasized that it provides "full SMB support" for Windows applications. Aghajee gave the clearest explanation, describing it as a fully managed file server built on Windows Server that supports SMB for seamless integration with Microsoft applications. That community consensus aligns with the technical requirements and the vendor documentation, so there is no reason to doubt option C.