Just in case is this folder on another harddrive?
If not it should.
It’s not the question of will the hardware brake it’s the question when it will happen.
oh absolutely and actually that happened awhile ago to me as well, my hard drives decided to fail so the ones I have now are brand new thankfully, I’ll make a triple backup just to be extra safe.
What if you need a file that was from a while back to assist with fixing a regression but you no longer have backed up? 
With a VCS you would be able to retrieve the file in exactly the state it was in back when it was working correctly, but with your solution you would have to start fixing it from scratch. This is one of the major benefits of a VCS outside of normal backups. You can retrieve a file from any point in the history of your project’s commits.
You’ll even be able to see the exact changes that were made to the file in question as commits were made.
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Unity collab. It will happily archive everything you ever did providing it’s inside a Unity project.
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