Which AWS service will meet these requirements?

Explanations:

Amazon FSx File Gateway provides a way to access Windows file shares in AWS, allowing on-premises workloads to seamlessly connect to file shares without needing additional infrastructure. It supports SMB protocol, making it ideal for integrating with existing Windows applications.

AWS DataSync is primarily designed for transferring large amounts of data between on-premises storage and AWS storage services. It does not provide direct access to file shares but rather facilitates data migration or synchronization.

Amazon S3 is an object storage service and does not directly provide Windows file shares. While it can be accessed via the AWS SDKs or APIs, it does not support SMB or NFS protocols natively, making it unsuitable for Windows file share access without additional configuration.

AWS Snow Family is focused on data transfer and edge computing solutions. It is used for transferring large data sets to AWS, but it does not provide direct access to Windows file shares and requires physical hardware, which does not meet the requirement of not provisioning additional infrastructure.