How can I prevent games from saving to OneDrive Documents folder?

Instead of the whole documents folder, you can try to choose only games specific folders inside the Documents folder.

If you can't do it too, you can try to Unlink your PC from OneDrive or even uninstall OneDrive (if you don't use it). You will still be able to upload manually your files to OneDrive and all your files that are being saved on OneDrive/.... will get back to your computer normal path.

Now I'm not really sure if you'll need to reinstall games or not, but that's the only option I can see that can work.

i would google each game for locations, they could be in the save folder, documents folder, apps folder or even cloud. there is no specific save location.

I go to my Documents, and the Saved Games folder is not a thing.

Once you start an upload from your console to OneDrive, the videos and pictures to be uploaded are added to a queue and uploaded in the background. After a while they should be visible in OneDrive.

Game clips will be available in Videos folder and then in a folder named Xbox Game DVR. Screenshots will be under folder named Xbox Screenshots inside Pictures folder. You can obviously try to search the term "xbox" in your onedrive.

I think I have an answer. The Xbox One versions of Onedrive only shows picture or videos. From the Onedrive website you click on a folder and change the folder type to pictures.

How stupid. The folder is still empty on the Xbox One unless you put a picture in it.