My use case is different (B2 for offsite data backups) but I went down the path of rclone and it has been working out very well. A lot better than I expected. I read their official docs (installation, usage, the backblaze setup and crypt) to get started. Played at the command line for a few minutes and realize how quick and easy it was. Wrote a script to automate it and off to the races I went!
Deebster