At its most basic, Network attached storage, or NAS, is a great way to share files on your local network. But it’s also a perfect solution for backing up your computers, streaming media across your home network, or even torrenting files to a central server.
pocket source: https://lifehacker.com/5822590/turn-an-old-computer-into-a-networked-backup-streaming-or-torrenting-machine-with-freenas