Depending on your budget, I use a Synology NAS DS-211j. Basically it is a network attached storage and I installed two 1TB hard drive in there. Setup in RAID1 so they mirror each other. It gives me a piece of mind since I would need both hard drive to fail to loose data. The whole setup should run between 400-500 depending on the hard drive.
But any brand would work. Such as Drobo, Q-Nap, Dlink and many others.
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