Storage: Directory - Proxmox VE
https://pve.proxmox.com/wiki/Storage:_DirectoryProxmox VE can use local directories or locally mounted shares for storage. A directory is a file level storage, so you can store any content type like virtual disk images, containers, templates, ISO images or backup files. You can mount additional storages via standard linux /etc/fstab , and then define a directory storage for that mount point.