You will be better off just getting an external hard drive, and do weekly backups / syncs. Raid is the lowest form of data backup. I stopped using raid storage years ago, since I've had quality Raid controllers fail and take all the data with them. A virus will do the same thing to both sets of your precious data. As will a bad power surge or more commonly, a PSU malfunction. I worked with a guy who kept a separate machine for his backups, and lost all his data anyway due to a leaky toilet while he was out on vacation. Yet another customer lost everything in a house fire. He now keeps his backup server in a fridge in his shed, 15 meters from his house with a gigabit line. I've been using external drives since my 2 last Raid failures, and it works. In this case I didn't have anywhere to backup a 1TB drive to, so now I'm screwed. If you have any money, buy whatever external drive you can comfortably afford (You can get good ones for about $100), and backup whatever important data you can fit on it. It may not be an emergency right now, but you'll be glad you did when your drive inevitably fails.