A server hosting file shares is an example of which of the following types of storage?

SAN (Storage Area Network) delivers block-level storage over a dedicated high-speed network such as Fibre Channel or iSCSI, and does not present file shares directly to end users.

NAS (Network Attached Storage) is a storage architecture in which a dedicated device or server exposes file-level storage to clients over a network using protocols such as SMB/CIFS or NFS. A server hosting file shares is the defining implementation of NAS, as it serves files directly to multiple network clients simultaneously. This distinguishes NAS from block-level storage (SAN) and from physical drive interface standards (SATA, SAS).

SATA (Serial ATA) is a physical hardware interface standard for connecting storage drives to a system, not a networked storage classification.

SAS (Serial Attached SCSI) is a physical drive interface protocol designed for enterprise storage devices, not a type of networked storage architecture.