Without some type of tool, you're not breaking out of a closed car window. Police & rescue use special "glass breaker" tools --- typically a hardened steel, carbide or ceramic point on a striking instrument like a police baton or a spring-loaded punch tool. But don't take my word for it -- go down to your local wrecking yard and "buy" a window that's still mounted in a door -- then try to break it with your bare hands. Don't forget to bring a friend along to drive you to the hospital when you are done - it's hard to drive with broken hands...

I use a file replication program to create a second copy on an external disk whenever a file update in the designated directories happens. Then it creates another copy to another external disk once daily. Periodically (I have a weekly reminder in my calendar, but sometimes I do it more often) I bring home yet another external drive from work, replicate to it, and take it back to work with me. On top of that, I have TimeMachine running. I also periodically (every time I update it) dump my photo archive to a 512 GB SSD & a 512 GB thumb drive -- I expect to need to go bigger sometime next year. These stay in my go-bag, so they are always with me. Worst case, a single disk failure shouldn't cost me any data and two failures should cost me at most a day. If the house burns down, I should not lose more than a week's worth of non-photo data. RAID has burned me too many times in the past -- I consider it nothing more than a single spindle in my backup scheme...

A lot of us do. More than you would guess.