rcloud (https://rclone.org https://rclone.org) is great too if you want an open source client solution for syncing to the commercial storage service. If you can

rcloud (https://rclone.org https://rclone.org) is great too if you want an open source client solution for syncing to the commercial storage service. If you can setup your own server for rcloud like you'd do with Syncthing, rcloud can be enough.