by the user to search and analyze the file type or specify to find the existence of large-capacity hard disk in a long time and had not been implemented or open documents, search results will show an analysis of document window (the top of the document information, below is the file name and some information), it will file name, path, creation date, file size (actual disk size and occupy the wasted disk space), and document the version number is displayed, and allow users to decide Do you want to delete in order to release those wasted disk space.