Make sure you backup Microsoft Outlook too. Even though you have all your files backup up, your email program needs a backup too. This way your email messages, contacts and calander updates will all be current. For those that have trouble following the written directions, the video at the bottom may be of help.
The method I use to backup my outlook is done by exporting all the information to a PST file.
Before you begin the steps below, clean out any items from your trash, delete any sent items you no longer need. Delete any other items you no longer need as well, that will make the backup file smaller.
Add this file to your regular computer file backup location.