Adding a hard drive doens't void the warranty, neither does opening the case.  If you damage anything in the process of upgrading that is not covered by the warranty.  The warranty also doesn't cover the new hard drive, or troubleshooting the system with the new hard drive or problems caused by the upgrade. 
So it’s been a couple weeks since I got my R12 in and I love it. I just regret not adding on more storage to the device. Is it possible to add hard drives to it? If so what hard drives would you guys approve of and would it violate the warranty?
Aurora R12, 1 week after owning, a storage upgrade?