Unable to upload 8TB file to backblaze.

I have been trying to upload a 8TB file to backblaze. I have been getting errors with trying to uplaod the file:

trying to upload an 8TB file and am getting the following errors:
2020/07/30 18:40:54 ERROR : \mjdc01backup: Failed to copy: "\mjdc01backup.bin" too big (8798240510000 bytes) makes too many parts 41954 > 10000 - increase --b2-chunk-size

so then i tried to raise the chunk size to 1 gigabyte and i get this:
2020/07/30 18:47:31 Failed to create file system for "remote:mjcres/": b2: upload cutoff: 200M is less than chunk size 1G

Backblaze says it's an rclone problem. As noted above when i try to increase the chunk size above 200 megabytes I get the second error. Any ideas? I am trying ti deploy this machine in a paid commercial environment and not being able to use B2 is going cost me this job..and all future backup jobs i was going to base on freeNAS.