If I were to add an external HD (320G) by way of a USB connection, will FSX think I went out and bought a brand new computer ????Also, will the external addition result in another "silently" added drive to my puter, making it a three (HD-wise) drive unit (which it cannot do internally, i.e. 2) ?allen

No, and yes.Allcott

Allen,If you do decide to get it... could you please download and run this utility called HDTach and post the results?You could run that on you primary internal HD as well as on the USB HD and compare the results as wellMannyhttp://www.simplisoftware.com/Public/index...?request=HdTach