The AWS Storage Gateway service added the Server Message Block (SMB) protocol to File Gateway, enabling file-based applications developed for Microsoft Windows to easily store and access objects in Amazon Simple Storage Service (S3). With File Gateway, applications can now store files as objects in Amazon S3 using SMB versions 2 and 3, as well as Network File System (NFS) versions 3 and 4.1. You can control access to File Gateway SMB file shares and objects using your corporate Active Directory (AD) domains, or you can use authenticated guest access. File Gateway caches your most recently used data locally, providing on-premises applications with low-latency access. File Gateway simplifies moving data to Amazon S3, supporting hybrid object-based workloads, such as machine learning and big data analytics, as well as backup and data archival in Amazon S3.