>>9845697NAS isn't a specific product, it just stands for "network attached storage." you could technically just use any old computer as that. a better option though is just get a RAID controller
in case you don't know, RAID is "redundant array of inexpensive discs," where you plug in a bunch of hard drives into it and you tell it how much you want backed up (so if you plugged in, say, 8 equivalent drives into the thing, you could designate 4 or 6 or 7 drives as backups and redundant backups) and then you connect it to your network
you can then access the controller and it'll present all the drives as just one block of storage, and you put in files like you would any directory and the controller automatically handles the backup process and disc distribution
you have to do some administrative stuff to set it up properly, but it's very easy to scale up and work with once done. it's how datacenters do their storage
