Say you have emails from Fred you want to save. Firstly, create a folder called Fred on your desktop, open it, and then minimise it. Then open outlook, select all the fred emails you want to back up, and drag them down to the collapsed fred folder. This will then open up, deposit the mails in the folder, let go of the button, and that's it.
In Outlook
Go to file
Select "Import and export"
Select "Export to a file"
Select "Personal folder file"
Highlight "Personal folders" and check box "include subfolders"
Select were to save backup it should be another harddrive or external drive
Select "finish"
then if your HD fails you have a copy of your e mails to that date.
Keithg