You can test your speed to B2 here: https://www.backblaze.com/speedtest/

Assuming it's good, we'd need to see logs using the Diagnostic option in the toolbar to see what's going on. Please refer to this forum post when submitting. Thanks.

Thanks David. The upload speed to B2 is 9.4 Mbit/s. (Download is 154 Mbit/s.) I tested B2 speed with another computer on the same network and got 95 Mbit/s upload.

Backup gets stuck on one file and never progresses until I stop and start the backup again. File size is 38mb. I've let it run overnight and it remains on that file.

I don't see the Diagnostic option in the toolbar.

https://kb.cloudberrylab.com/backup-mac-linux/obtaining-logs-on-macos&linux

Hi David. Thanks for your help.

Cloudberry was getting stuck on a directory from 2010 with a bad name. The directory name somehow had a carriage return in it. Very weird. Once I renamed that directory it started progressing and hasn't stopped.

Thanks again for your help!

Great news. Thanks for the update.