How to perform automatic Saving & Backup of your Word
file?
Microsoft Word also has an important feature of
saving your work automatically into the current document after specified
time. By default, word automatically saves your current document
after every ten minutes but you can change this time. It is also good
idea for you to create backup of your files automatically. Because in
this global network a computer can crash, a virus problem, or a hard
drive failure can wipe out everything.
Follow the given steps to change default save time and enable auto
backup feature.
First choose Options command from Tools menu.

A small dialog box will open, here select the Save tab in the
dialog box.
Check the option "Always create backup copy" to set your word to
create backup copy of file each time, you save document. Word saves this
backup copy in same folder as your original document with .wbk
extension.
Now click the "Save AutoRecover info every" check box and enter the
time in minutes.

Click the Ok button of dialog box to finish the process.