To Fix Google Drive File Sync Issues:
Click Google drive icon and select Visit Google Drive on the web
Go to your Google drive folder, click More and select All Items
Select or highlight all the files that you don't need and click Delete Forever
You will see that the exclamation point from your Google drive icon will disappear and Google drive will start to sync again
Added resource on how to Fix Google Drive File Sync Issues:
From: https://support.google.com/a/answer/2...