If I want to export a VM on the vSphere Client to an OVA-File I get the error-message "Operation timed out". The VM has a size of ~3.5TB - I think thats the main problem because all other exports are successful. Is there a workaround or something else to solve this?
You can try to export it using the PowerCLI cmdlet
Export-VApp. I found it to be more robust than the vSphere- and WebUI-Clients.
Get-VM hugevm |Export-VApp -Destination "C:\Destination"
Don't let the name of the cmdlet fool you, it's not only for VApps, it works with single VMs as well.