I added couple of pictures from my desktop to OneDrive, but can't find them from my laptop in OneDrive. Yet, the pics appear in OneDrive from my desktop.
Are both devices using the same Microsoft Account??? Have you tried Browser and App?
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Right click on your OneDrive folder on both devices and Sync it. Items are only stored on the local hard drive until it is synced to the cloud. You may not be set to sync automatically.