you must have the worst internet on planet earth, to run such a complex setup.
not sure that is correct, don't you want rclone copy, not rclone sync
the best way to do that is --max-age.
and i think this is a better solution
https://forum.rclone.org/t/recommendations-for-using-rclone-with-a-minio-10m-files/14472/4?u=asdffdsa