Network-Attached Storage (NAS) is a data storage device that accommodates digital files, such as photos, videos, music, and documents. As its name stands NAS allows you to access files via Wi-Fi or a wired networks based on your use cases.

In general, NAS users place multiple hard disks into a NAS to build a RAID (Redundant Array of Independent Disks). RAID is a technology that combines multiple disks into one large storage space, which is called a volume.