These are the components of the network attached storage device I'm recommending. There are actually two options for the device its self, one that can hold two hard drives, which means you get the storage space of one hard drive (they're mirrored for redundancy). The other holds four drives, so you get the space of three drives. Essentially, you can have either 4TB* or 12TB* maximum for each device.
* Assuming 4TB drives. There are 5 and 6TB drives now, but there's a big premium. Those are an option, though.
Two of these drives minimum for either device. Up to four for the larger NAS. (5TB or 6TB are also options)
(alternative) 1 - This NAS device offers more potential storage space than the DS214.
