When files stored on OneDrive aren't syncing on your Windows 10 PC, it's likely a problem with the desktop sync app, and in this guide, we'll help you fix the issue.
Although, Microsoft touts OneDrive as the best cloud storage experience in Windows 10 to store and sync your personal documents and settings across your devices, sometimes the desktop client sync app won't work as it should.
Full story from the WindowsCentral blog...