Also how would I backup lets say 5 virtual machines. Currently I'm using a nfs share to a backup device. i have 3 options (snapshot,suspend and stop) and I want to backup email servers etc, etc. I have 3 options and don't know which one do I chose. The servers can never go down or not for at least a few hours. Currently I have 2x bonded network cards in the proxmox server and on the backup device there is only 1 network card with 2x drives working in raid 1. I feel proxmox really needs a backup option that allows me to select differential or incremental backups.