Backup storage on proxmox

Hi everyone, How do you manage your backup storage on proxmox? I have a mix of LXC containers and a VM with docker compose. Before, I just plugged in a usb drive to the VM and backed up every docker container via a cron job (using borg backup). When I tried to scale this method to other LXC containers on proxmox, I found the best way is to make the VM backup the LXC container, and copy the files over to the VM, and then archive the files using borg. Obviously, that is not the best option. How do you do backup in your homelabs/proxmox?