Most of the devices I have enable you to decide how to use the USB connection. For example, on most Nokia phones you can choose between "charging only", "PC sui

Most of the devices I have enable you to decide how to use the USB connection. For example, on most Nokia phones you can choose between "charging only", "PC suite mode", and "USB mass storage". I think my ICS Transformer Prime only provides "media device" and "digital camera" as modes, though.