Thanks for the input, guys. That's a great history, Rob.
Tom, I do just want a drive attached to my computer. I have a smaller NAS for stuff to share on the network, but I don't have much need for that, even. The Drobo would be for fairly specific uses. Crashplan backs up to local external drives in addition to the cloud, so the Drobo would be great for that. It would also be ideal for the stuff that populates my Plex server, if you know what I mean.
This would be a ways off, but I appreciate the input.
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Matt