[Description] Onebox Sync is running and a file is dragged to the local synchronization folder but no icon indicating "synchronizing" or "synchronized" is displayed on the file. For example, the "…2014 Archive" file in the following figure.

[Answer] Because the file name is invalid. File names in Onebox cannot exceed 246 characters, contain slashes (/) or periods (.), or start or end with a period (.). Rename the files so that these files can be uploaded to the cloud.