Ah. That would depend more on the method of expansion I think, but if you're working with any of the drives that SQL server relies on, you can just stop the service (instead of uninstalling) during the upgrade time, then bring the service back up when you're done, if you want to be sure.
Never stop learning, even if it hurts. Ego bruises are practically mandatory as you learn unless you've never risked enough to make a mistake.
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