Proxmox VE Backup & Restore
To get your VMs on Proxmox VE backed up, you'll have to install a lightweight backup plugin on each of your Proxmox hosts, and connect the Proxmox virtual paltform to Vinchin Backup & Recovery, then you'll be able to perform VM backup and restore.
Please refer to the below articles for step-by-step instructions of how to get Proxmox VMs protected.