Network Attached Storage
NAS's full form is Network Attached Storage, which is a file-level data-storing device that is connected to a network server. It is the high-capacity storing device that has the most versatile way to store data with which a user can connect the home or office network so that anyone (permission granted by the user) can access the files from it on their smartphones, PCs, Laptops, Tablets, etc without plugging into the device.
Using file-sharing protocols like NFS or SMB, NAS provides faster data access with configuration and administration-friendly access of files/data to its users. It has more than one storage drive arranged in redundant storage containers called RAID.