An organization is decommissioning its on-premises NAS device, which serves both NFS and SMB shares to employees' workstations. The company wants to avoid the cost of replacing the hardware or renewing its support contract. Most files are rarely accessed, but a subset is used frequently. The IT team wants to migrate all data to Amazon S3, apply lifecycle policies to transition infrequent data to lower-cost storage classes, and preserve the same file share experience for end users. A solutions architect recommends using AWS Storage Gateway. Which type of gateway is most suitable for this scenario?