Actually, this default behaviour is a little irritating. As Mukund says, the default behaviour should be that of a mass storage device. However, what actually happens for many devices such as cameras, the

Here the usb device manufacturer are to be blamed. Why a digital camera needs a CD for driver installation? It is simply a MSD. But the manufacturer do not follow standard usb descriptor for generic MSD, and when descriptor does not match, the generic driver is not used by PC.

Warm Regards,

Mukund Deshmukh, Beta Computronics Pvt Ltd. 10/1 IT Park, Parsodi, Nagpur -440022 India. Web site - http://betacomp.com