Nikon D300 - Manual (Page 252)

226
Q
Direct USB Connection
Connect the camera using the supplied UC-E4 USB cable.
1
Select a USB option.
Before connecting the camera to the computer, make sure the
correct option is selected for the [USB] item in the camera
setup menu (pg. 225).
2
Turn the camera off.
3
Turn the computer on.
Turn the computer on and wait for it to start up.
4
Connect the USB cable.
Connect the USB cable as shown. Do not use force or attempt
to insert the connectors at an angle.
D
USB Hubs
Connect the camera directly to the computer; do not connect the
cable via a USB hub or keyboard.
Power switch