You can view the status of selected files in Windows Explorer. If you enabled status icons for the backup software for Windows, you can see if a file has been successfully backed up, if a file will be backed up again, or if a file has not been backed up at all. For more information, see Seeing the Status of a File Selected for Backup.
These icons are enabled by default. Other programs may use icon overlays as well. If too many icon overlays are enabled, they may not display correctly, perhaps in the backup software or for some other program. Therefore, you may want to disable the McAfee Online Backup backup status icons.