Kenny as you read the last 2 posted about a raid setup. To make this simple just in case you don't know about a raid setup just make sure you buy 2 external HD's and back up to both. Trust me it's not if a HD will fail but when and you don't want to lose all your pictures. I back up to 3 separate HD's, now, this is because I had 2 HD's to fail at the same time. Lucky for me I know how to retrive data from a failed HD.