I quit using Backblaze after there was a problem with my files. It was a known issue with them apparently, and there was no way to recover the files. So, I had to start my initial backup over - like 3 years after I started using them. I figured if I was going to have to redo my initial backup anyway, I was going to research my options.
Since then, I've switched to
Crashplan, and I'm much happier. I even upgraded to the family Crashplan, so we can back up all of our computers in the house.