In no way am I able to restore from iCloud. I tried to backup once more on my original iPad, but it is forecasting to finish in more than 2 hours despite the most recent backup is only on last night which should involve very few new data. When I decided to use the older backup, the iPad Air couldn't restore as well and reported a loss of connection to the server. Darn I am trying the old school method: backing up to iTunes and restore from there. It's going use a lot of disk space on my 256GB SSD.... Cloud services are really unreliable. I think I won't pay for any extra iCloud storage from today.