I’m going to switch from Windows 11 to Linux soon but first I wish to backup every every data and config files I can in my current Windows installation, even those that wouldn’t natively work in Linux. I know the \Users folder is important to back up, but I don’t know what other directories I am missing.
Configurations, save files and the likes are typically saved in AppData. But be careful because some programs and videogames save data in their installation folder.
Users is enough. You won’t be able to restore anything else on Linux.
I wouldn’t even backup users, just your documents or any folders the user has created.
\Username\Appdata\Roaming includes the Firefox profile and Thunderbird E-Mails, which you can restore on Linux AFAIK.
Not sure if your Steam folder can be copied over, as well.