Upgrade Borg backup

I am assuming you're referring to private Centmin Mod Premium member's available addons/borgbackup.sh script? As you posted this on the public subforums

There's a limited size for dropbox log sending so wouldn't be suited to large backup files for that feature for https://community.centminmod.com/threads/using-dropbox-to-share-server-files.22327/

However for using Rclone method of sending to dropbox that is possible https://community.centminmod.com/threads/sending-nginx-upgrade-logs-to-dropbox-via-rclone.22402/ you just need to setup a separate new rclone remote instead of the one outlined dropbox1 i.e. new remote named cmm-backups or something and then manually export your borgbackup tar archive via borg export-tar command to send it.

borg export-tar to a zstd compressed tar archive file the borg repo named = conf.d-080719-131746 which contains your Centmin Mod Nginx Nginx vhost config files usually located at /usr/local/nginx/conf/conf.d will create ar backup at
conf.d-080719-131746.tar.zst

Code (Text):

borg export-tar --tar-filter="zstd -6 --rsyncable" /home/borgbackups::conf.d-080719-131746 conf.d-080719-131746.tar.zst

Then send
conf.d-080719-131746.tar.zst to dropbox via rclone remote cmm-backup you created earlier

Code (Text):

/usr/sbin/rclone copy conf.d-080719-131746.tar.zst cmm-backups:

Just write a wrapper shell script to run the borg export-tar command and then via rclone method send the backups