I am wondering the best way to permanently store my data, aside from DVDs. I have a whole lot of stuff from school, all my notes, presentations, etc, plus a bunch of video clips and other files that I plan to hold onto until I get into teaching. I know hard drives can go bad, but isn't there some kind of formatting/HDD that will copy the files into two places (maybe called a RAID setup?) I know nothing about this, I just want a way to guarantee my files will be safe. Thanks.