Office File Manager can help you to backup Excel, Word and PowerPoint files. It is a Microsoft Office add-in that lets you easily backup current working files in Excel, Word and PowerPoint , access , compress and mail recently used office files.
Backup your files in Excel, Word and PowerPoint with a single click. The smart, automatic backup function creates sequential saves to a different directory and keeps the files count to a limited number, so you don't have to clean the hard drive manually. Access , mail , zip to a folder , zip and mail up to 500 recent office files, grouped by folders , and sortable by name , size and time of last modification. Create a list of favorite folders and gain access to your most frequently used files without even leaving the office applications.

Office File Manager adds a menu and a toolbar in Microsoft Excel , Word , PowerPoint and Outlook.
1. Open a File - Opens the main dialog with a list of recent office files.You can open , mail , zip to a folder , zip and mail files from the list.
2. Save and Backup - save the current file in Excel , Word and PowerPoint and copies it to a different directory. All backuped files are accessable from the Open a File dialog - Browse backup files
3. Attach \ Open - this toolbar is created in Outlook, You can directly attach files to your message from recent office files and your favorite folders.

The license of this software is Free Trial Software, the price is $24.95, you can free download and get a free trial.