On a Macintosh, always drag the memory card icon on the desktop into the trash to eject the card before you turn off the printer or unplug the USB cable. Otherwise, you may lose data from the memory card.
Make sure the memory card light is not flashing.
Remove the memory card from its slot.
For Microdrive or CompactFlash cards in the lower slot, press the button on the right twice to eject the card.
To remove the card in the upper slot, push in the card, then pull it out.