Windows 7

Mexay
                    Just a quick question. If I install Win 7 to my external drive, will it wipe everything that I've got on their?
                
            
some-_1
                    It shouldn't do as Windows 7 only formats a drive if you tell it to during the installation. However it's always better to be safe than sorry so I would definitely back it all up first just in case.
                
            