The status.plist is one of the files that tells the truth about the backup completion time if Apple iTunes was used. If the Microsoft app was used, the info.plist will store the most accurate time of the backup and the status.plist may not be updated. When the status.plist is available, the file will include the completion time of the last successful backup. If the backup fails, this file will not be updated.  This is the first plist that is created and written to during an iOS backup extraction.