Advice on backing up data

Eyelgame

Honorable
Nov 15, 2013
33
0
10,530
I have a 2tb internal Hard drive with HD videos on it. I would like to back up this data since I've already lost it once but used a software recovery program to get most of it back. Now I'm looking for a way to back my data up. I was initially going to buy an external 3tb hard drive because I wanted more storage space and then buy an additional 3tb hdd to have a backup. Then a friend briefly mentioned RAID. I have a basic understanding of how it works but would just want to purchase one. Not 100% how these work but if I bought something like this: http://www.amazon.com/gp/aw/d/B00KU686D2/ref=pd_aw_sim_sbs_147_1?ie=UTF8&dpID=410G1MngXuL&dpSrc=sims&preST=_AC_UL100_SR100%2C100_&refRID=11P6HF2PA7XMRSRYJDX9
Would I be able to backup my files and watch them from a device like this?