Backblaze saved my butt and reputation once.
My friend called me over to transfer his data and apps from one PC to a newer one. No problem.
So I did an inventory and figured out how it needed to happen, and he had a nice USB drive we could just use as intermediary.
I dragged-n-dropped every last file over there. I can't remember the details, but for some reason, I needed to wipe the source drive, because it was also the destination or something.
I did a "Properties" check to compare the HDD with the USB and something wasn't right. The file and folder counts were both far too small. I looked at my friend and said "I don't like this... should I proceed?" and he goes "Yeah!"
So I wipe the source and do the partition and install, and yeah, all his Thunderbird mail has gone missing. Eventually I realized it was my utter rookie mistake of not showing hidden files before drag-n-drop.
So I'm white as a sheet and shaking in my boots when he goes "but what about my BackBlaze?" "Your what?" Something he didn't even mention while I was taking inventory!
So we get the little agent installed, and check out his file space, and his whole livelihood comes screaming down the pipe, and I can breathe again, and we celebrated success over some homemade kombucha.