NAS mit alter Samba Version per Konsole einbinden
https://forum.proxmox.com/threads/cifs-issue-error-with-cfs-lock-file-storage_cfg-working-now-but-shows-question-mark.45962/
pvesm add cifs extbackup --server 192.168.178.31 --share share --username server --password server --smbversion 2.0