a. Check File name:


· Remove any unsupported characters \ , / , : , * , ? ,  " , < , > , | , # ,  %)


· Rename the file


b. Stop and Restart Syncing library:


· To stop syncing a library select the One Drive for Business icon at the bottom of your screen right-click and then select Stop syncing a folder


· Select the folder you want to stop syncing, and then select Stop syncing


· When you stop syncing a folder, the folder is disconnected from its library and go to actual SharePoint folder on your pc and delete the folder


· To start syncing a library select the OneDrive for Business icon at the bottom of your screen right-click and then select Sync a new library


· Select Sync a different library instead


· Enter your SharePoint site (e.ge. https://contoso.sharepoint.com)


· Select the library from the list and click Sync


· Waiting to sync all your files (see green light)