Remove files and folders from OneDrive that do not need to be synched.
If the problem persists, follow the steps to reset OneDrive:
- Select the Windows Start icon, and select Run.
- Type C:\Program Files (x86)\Microsoft Office\Office16\GROOVE.EXE /reset and select OK.
- Wait at least 2 full minutes, and then see if OneDrive starts to download files.
After resetting OneDrive, if the issue persists, this suggests some issue with one or more of the files in OneDrive. One solution is to move every file in OneDrive to another storage location, such as C:\ or H:\ or I:\, and then one by one, re-add a file to OneDrive and manually sync OneDrive, until the problem files are found.