How to store QC to cloud for Coros updates?

I need help on how to store my QC to cloud for backup so I can get the Coros updates.
Also, do I install all of the updates in the order they were released or just install the latest?And what are the current updates?

pg 99 of manual:

The QC will handle the updates automatically once you start the process.
the latest CorOS is 2.3.1