Windows 11, if one has OneDrive turned on backs _everything_ up in terms of data/files.
I bought a second computer recently which was the same as my Samsung Galaxy Book 3 Pro 360 --- after setting up Windows I found that it had downloaded _all_ of my files onto the new computer, but the wallpaper wasn't the same --- went to my old one, figured out where the file was and copied it to the desktop. While I was trying to figure out how I'd copy the file over, the file appeared on the desktop of my new computer.
I bought a second computer recently which was the same as my Samsung Galaxy Book 3 Pro 360 --- after setting up Windows I found that it had downloaded _all_ of my files onto the new computer, but the wallpaper wasn't the same --- went to my old one, figured out where the file was and copied it to the desktop. While I was trying to figure out how I'd copy the file over, the file appeared on the desktop of my new computer.