As I already wrote, unfortunately that didn't work for me. I'll just leave it with NFS now. The main thing is that it works, and the network is not publicly accessible anyway.Hello, fyi I have the very same problem "ERROR: Backup of VM xxx failed - unable to open '/mnt/pve/<share of MyCloudEx2>/dump/vzdump-qemu-<something>.tmp/qemu-server.conf' - Stale file handle". Manually writing files from within the shell works fine.
I also use the MyCloud Ex2 Ultra. Solution for now is "options noserverino" and a restart of the host. Hope this will fix things in the long term.
Best regards
Daniel
Thanks for all your efforts