Backup and Restore - Proxmox VE
https://pve.proxmox.com/wiki/Backup_and_RestoreIt works by performing a Proxmox VE live backup, in which data blocks are copied while the VM is running. If the guest agent is enabled ( agent: 1) and running, it calls guest-fsfreeze-freeze and guest-fsfreeze-thaw to improve consistency. A technical overview of the Proxmox VE live backup for QemuServer can be found online here.
Storage - Proxmox VE
https://pve.proxmox.com/wiki/StorageThe Proxmox VE storage model is very flexible. Virtual machine images can either be stored on one or several local storages, or on shared storage like NFS or iSCSI (NAS, SAN). There are no limits, and you may configure as many storage pools as you like. You can use all storage technologies available for Debian Linux.
Backup and Restore - Proxmox VE
pve.proxmox.com › wiki › Backup_and_RestoreYou can use the prune simulator of the Proxmox Backup Server documentation to explore the effect of different retention options with various backup schedules. Retention Settings Example The backup frequency and retention of old backups may depend on how often data changes, and how important an older state may be, in a specific work load.