“Is there a reason NOT to do so.”
Yes, slower performance, lost space.
“Is there a warning NOT to do so.”
Is there a warning not to drop it in the toilet?
"I wanted to use as a Windows 10 installation drive.
And guess what that lovely tool does with your drive.
IT FORMATS IT."
Windows ALWAYS does what it wants, whether it needs to or not and whether the user wants it to or not.
“NO there is no reason to not format your USB drive.”
See reply #1 above.
