If a file is having issues saving or isn't updating, one thing to check for is the OneDrive Sync icons. This article will explain what the sync icons mean.

 

OneDrive sync error icon

A red "x" icon on a file icon means the file cannot be synced, this can be caused by a filename that may contain characters that are not allowed to be uploaded such as *,!,$,%

OneDrive sync error iconOneDrive for Business sync error icon A red "x" icon on the OneDrive icon in your system tray (next to the date and time in the lower right corner of your screen) means there is a sync issue somewhere, click the icon for an explanation of the error.
OneDrive sync in progress iconOneDrive for Business sync in progress iconOneDrive sync in progress icon Any icon with blue arrows in a circular motion indicate a file being synced, this process is automatic and does not require attention from the user. If the arrows do not go away after an extended period of time a restart of your computer may resolve the issue.
OneDrive file shared icon An icon of a person next to a cloud indicates that a file is being shared with someone.
OneDrive online file icon A blue cloud icon indicates that a file is saved only on OneDrive, if you always have internet access the file will automatically download when you try to open it. If you know you will be going offline right click the file and select "always keep on this device" this will download the file so you can access it offline.
OneDrive always available file iconOneDrive locally available file A green check box indicates that a file has been downloaded to your device and is also available on OneDrive. No user attention is required if you see this symbol.