They only needed about 500GB.
And personal is for desktop systems. You have to use Backblazes macOS/Windows desktop application, and the setup is not zero-knowledge on Backblazes part. They literally advertise being able to ship you your files on a physical device if need be.
Which some people are ok with, but not what most of us would want.
Scrollone@feddit.it 15 hours ago
You can’t use the $99/year plan for that. The authorized client only works as a desktop application on Windows and MacOS.