"It's saved me a few times. I give a $10 donation each time. I have a micro SD reader with a 64G card, so I can go back a long way. A restore takes less than 5 minutes. A VITAL utility. NOTE: you must run it in the background, if you have it open it doesn't take snapshots - this is confusing if you come from Windows. Set it up for timed backups and then check that it is, in fact, taking the backups. Once you understand this you can set up your backup schedule - just check occasionally that it's working and RELAX."