We really need WD to step up and create a Backblaze B2 Sync client. We need more apps and integration to services for these NAS devices.
Duplicati can sync to backblaze
See https://www.backblaze.com/blog/duplicati-backups-cloud-storage/
If you know your way around with SSH and the command line, I recommend rclone.
Here’s how to install it.
cd /shares/Volume_1/ && mkdir rclone && cd rclone
Download the package. Note: for EX2(Ultra), change amd64 to arm below
download_link="https://downloads.rclone.org/rclone-current-linux-amd64.zip"
rclone_zip="rclone-current-linux-amd64.zip"
curl -O ${download_link}
Unzip and install
/usr/bin/unzip ${rclone_zip} -a
r=$(pwd)/rclone-v*/rclone
chmod +x $r
ln -sf $r /usr/bin/rclone
Now you can get started with rclone
rclone -h
However note that on a reboot, your /home directory (with your rclone settings) and /usr/bin/rclone symlink is gone… There’s ways to persist them, e.g. by installing my Entware package.
When you do, create a symlink like this
ln -sf $r /opt/bin/rclone