The file you need is your Personal Folders file (*.pst) It's where all the
mail, calendar, contacts etc are stored.
Take a look at these pages for info on Outlook data backup or transfer:
http://www.slipstick.com/config/backup.htm
http://www.howto-outlook.com/Howto/backupandrestore.htm
http://office.microsoft.com/en-us/assistance/HA010771141033.aspx

Signature
Russ Valentine
[MVP-Outlook]
> My outlook program is corrupt and I need to delete the entire program and
> reinstall. I have tried repair and it crashes every time I open it. I
> really
> need my contacts. How can I find the folder with my contacts and copy it
> to a
> portable hard drive or somewhere else on my "C" drive? Thanks