The Photos app in Windows 10 automatically connects to the Pictures library and OneDrive folder on your system. We’ve already covered how you can stop the app from showing photos saved in OneDrive. If you would like for the Photos app to show images from other folders, or to stop indexing and showing photos from the Pictures library, you can do so from the app’s Settings. Here’s how.
Open the Photos app and click the cog wheel button at the very bottom of the left column. In Settings, scroll down to the ‘Sources’ section where the magic, or lack there of, happens.
You will see where Photos is getting its images from. If you want to remove a source, simply click the cross next to a folder path. You can even remove the Pictures library if you like.
To add a source, click the ‘Add a folder’ button at the bottom of all listed sources.
Wait for the select folder box to open. It’s kind of slow as far as our own tests went so it might take some time to pop up for others users as well. When the select folder box appears, navigate to the folder you want to add, select it and click ‘Add this folder to Pictures’. The folder isn’t added to your Pictures library; the text on the button is obviously low quality control at Microsoft’s end. The folder will be added to Photos and all images in it, and in any sub-folders inside the one you just added will start appearing in the Photos app.