Win10 Boot-Stick to Win11

Hi,

I have a USB stick that I mainly use as a boot stick or as a storage medium for the “important files” in the event of a new installation.

But now I want to change the media creation tool from win10 to win11. When I want to format the dedicated partition in the stick, Windows tells me that ALL files on this disk will be formatted.

However, the “important files” should of course be retained and only the media creation partition should be formatted.

Is it the case that only the part encapsulated for this purpose is formatted or the entire USB stick?