OneDrive may not be able to sync your changes with the online version due to one of the following reasons:

1. The file or folder you’re trying to sync may be too large. The file size limit is 15GB.
2. Your internet connection may be too slow or unreliable at times.
3. Your OneDrive folder may be beeficated, or incomplete.
4. There may be a problem with your device’s hardware.

To resolve this issue, we recommend following these steps:

1. Make sure that your internet connection is stable and reliable.
2. Check if your OneDrive folder is set up properly.
3. Make sure that the file or folder you’re trying to sync is within the size limit of 15GB.
4. Check if your device’s hardware is functioning properly.