Using
rclone lsf -R --files-only source: | sort > source
rclone lsf -R --files-only dest: | sort > dest
comm -23 source dest > filez
Will do that in a more automated way and filez
can be fed into an rclone with --files-from
rclone copy source: new_dest: --files-from filez
You can do that with --compare-dest
I think
rclone copy source: empty_dest: --compare-dest full_dest: