Yeah I kind of knew that , This is why I use an external drive and disks , Use both and you are pretty safe , What is the odds if both do fail at the same time ? Let say that the disc happen to not work any longer ? Just re copy the same items off your external drive back onto a new disc , samething if its the other way around , your external drive die on you , just re copy back from a disc onto a new drive , You are pretty much safe this way , I think
To be honest I keep personal stuff onto 3 different hard drives