"Not Syncing" is the most common issue in One Drive. One Drive will fail to upload/downloads the files or folders when having sync issues. There are many reasons for One Drive to stop syncing.
Some of them are as follows:
Upload data exceeded the file size
Fixing Sync Issue
Restart One Drive
Exit the One Drive from the system tray/notification icon and sync it by Opening up your "One Drive" again.
Reset your Sync Connection
Go on Start Menu. Type in Run. Type in the following commands
%localappdata%\Microsoft\OneDrive\onedrive.exe /reset (Try this command first )
C:\Program Files (x86)\Microsoft OneDrive\onedrive.exe /reset (Try this if the first command doesn't work)
This command will disconnect all your existing sync connections in OneDrive.
Reconnect your One Drive
Click on OneDrive icon that is in your system tray > Settings > Account > Unlink this PC.
It will disconnect your Microsoft account from the one drive. Sign back in again and it will start the syncing process again.
Check Computer Storage
Make sure there is enough storage in your local drive. One drive will stop syncing even if there is enough space in your one drive but not enough available space in your local drive.
Clear out unwanted files in your local storage if it is a storage issue.
These are some of the fixes that users can apply when they are having sync issues with their one drive.
Please contact email@example.com if require more assistance.