If you are the really paranoid type and concerned about a nuke striking your home and obliterating both the SSD and External drive, you can go one step further. There are online services (as in internet based) that will store your data in the cloud. One I have used before is Mozy Backup. It's free up to 2GB. https://mozy.com/home/free/Now storing all of your confidential information out in the cloud maybe counter intuitive for a paranoid person. There have been countless reports of data being stolen by hackers from some of the biggest (and you would think most secure) companies in the world. If exposing your data on the internet is a risk you are not willing to take, you can go with a more traditional approach. Take out a safety deposit box at a local bank and purchase yet another external hard drive, which you can periodically update and rest assured that the destruction of your home would not also mean the obliteration of your files. It is a pretty hard core option but this is a write up on the ultimate home PC backup solution after all.