How do I successfully switch to XFS filesystem without corrupting any data?

My MongoDB has recently been using lots of CPU on IO Wait. I believe by switching to XFS filesystem it should stop these issues. How can I successfully do this without corrupting any of my current data? I am on Ubuntu 18.04. My disk is currently ext4.

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If you have enough space elsewhere you can shutdown mongod and move all the files in the data directory out of the way. And move them back when after reformatting.


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