Seagate Central review: media sharing for the home, plus backup too

We really enjoy the ability to consume content on any device from just about anywhere we may roam. The cloud has been a big part of making that happen, but there are still a few things the cloud can't do nearly as well as local storage -- namely, share large files and provide continuous full backups of large media libraries. Attempting to bridge that gap is the Seagate Central. Ranging in price from $189 to $259, depending on whether you get it with 2TB, 3TB or 4TB of space, the Central connects to your home network and gives you a single place to store or back up your content, making it accessible both at home and on the go. That's the idea, anyway. But what about the reality?