Ever since the advent of "Time machine" I have been confused by the idea that TM doesn't actually back up EVERYTHING... so I got Super duper AND Carbon Copy Cloner, thinking that they would improve my chances.... If I make a superduper sparse image and want to restore from the external drive containing the image, do I also have to have SD on the external drive, or just on the original machine? Or do I need to have it on the external first and do the SD image from there? OR.... Am I better off to boot from the external and use CCC to clone to the external - and is it easy-restorable? Or do I simply use Time Machine and try not to think about what it ISN'T backing up? it's all so VERY confusing. What's the accumulated wisdom from the forum on this potentially emergency conundrum.