How-To Geek shows us a great trick for using an inexpensive Rasberry Pi microcomputer to back up ever-so-important digital files. And it does so at a significant energy savings.
"The benefit of having an always-on network storage device is that it’s extremely convenient to have your data (or backup destination) always accessible to the computers both inside and outside your network. The downside, in most instances, is that you’re consuming a fair amount of power for the convenience," notes How-To Geek.However, the Rasberry Pi system would use a fraction of the energy consumed by a typical server in an office. It might not run quite as smoothly or quickly as a high-powered server, but it could do the trick for your own purposes.
LifeHacker points out, "The end result is a NAS that uses about $5 worth of power a year. That's a huge drop in your utility bill compared to a full computer running all the time."
Essentially all you need is a $35 Raspberry Pi and "one USB external hard drive for simple network backups and file serving or two (at minimum) USB external hard drives for local data redundancy." You'll do a little bit of coding, all lined out in the tutorial, and voila! A network storage device that runs on an itty bitty amount of electricity.
Check out the entire tutorial on How-To Geek.