But can exclude disks from backup. But keep in mind that excluded disks might be destroyed while restoring the VM. (PVE will wipe the whole VM with all disks and then create a new one based on the backup...so it will destroy excluded disks but won't create a new one as they aren't part of the backup...see here: https://forum.proxmox.com/threads/feature-request-advanced-restore-options-in-gui.109707/)