Hi canove,
The configuration backup is stored in: /var/lib/nethserver/backup/
backup-config.tar.xz
backup-config.tar.xz-content.md5
backup-config.tar.xz.md5
You can make a cron job that will copy those file to the samba share, just before the backup to the cloud.
But, the config backup is included in the config data backup. So there is no reason to back it up.
You can try to find it in the data backup: (might take some time…)
# /sbin/e-smith/backup-data-list -b backup-data | grep backup-config.tar.xz
Sun Jun 2 03:00:21 2019 var/lib/nethserver/backup/backup-config.tar.xz
Sun Jun 2 03:00:21 2019 var/lib/nethserver/backup/backup-config.tar.xz-content.md5
Sun Jun 2 03:00:21 2019 var/lib/nethserver/backup/backup-config.tar.xz.md5
...
My backup starts at 03h00.
Michel-André