This is because your Launchkey is currently in 'MSD mode' which allows it to appear as a storage device, like a memory stick, so that you can get access to our Easy Start videos.
To take your Launchkey Mini MK3 out of 'MSD mode' and stop any prompts:
- Disconnect the USB cable from the Launchkey.
- Hold down the 'Shift' button (1) and connect the USB cable.
- Press the Yellow pad (2) so it is dim.
- Press the play button '3' to exit this mode.
The Launchkey will now no longer appear as a mass storage device and will work correctly as a keyboard.