I have had Proxmox running nightly backups and saving them to my NAS for years now without any issues. I've been thinking that it would also be nice to have these copied over to my cloud storage (some smaller company, no available plugins).

I know Proxmox Backup Server exists, but not much more than that other than it can backup to popular cloud providers.

The cloud provider I have has a Linux client that will create a shared folder on the system. My thought was to mount the Proxmox VM backup location with CIFS, install my cloud client and then write a script to run as a cronjob that would copy files from the Proxmox VM to the cloud folder each night.

This feels a bit clunky so I just wanted to ask if anyone knew of a better solution.