@YuhTM The first post on page one has instructions for stopping OneDrive from syncing Documents and for getting rid of it entirely, under "I don't want OneDrive to sync my files" and "I want to get rid of OneDrive," respectively. Choose whichever option works for you and follow the instructions.
Once you've done that, and before you move around any files, run the same command in Command Prompt (yes, you did it correctly) to see the new file path to Documents. Ideally, it should say this:
C:\Users\basma\Dokumenter
If it does not, right-click the Documents icon in a File Explorer window, the one in the left panel with a special icon (as opposed to a yellow folder icon), and select Properties > Location. Click Change, then choose the above file path as the new location.
The other option is to edit the registry to force the location to change. That's covered in this guide:
https://support.microsoft.com/en-us/topic/operation-to-change-a-personal-folder-location-fails-in-windows-ffb95139-6dbb-821d-27ec-62c9aaccd720
You only need to change the location of Documents, not anything else. Double-check your work with the Command Prompt command, and when the location is correct, launch Sims 4 and make sure it's now reading Users > basma > Dokumenter etc. as well. If so, move your saves and anything else you want to keep to that folder.
If the process goes wrong at any point, or you're not sure what to do, stop there and let me know what isn't working or is confusing.