When you finish copying files to or from a memory card in the printer, you must carefully follow the steps in these sections before you turn off the printer or disconnect it from your computer.
Make sure that both the memory card light and the On light are not flashing.
Turn off your computer.
Turn off the printer or disconnect the USB cable.
Note:
If you turn off the printer or disconnect the USB cable before turning off your computer, you see the message “Problem Ejecting USB Mass Storage Device.”
Drag the removable disk icon () on your desktop into the trash.
Caution:
Always drag the removable disk icon on your desktop into the trash to eject the card before you turn off the printer or disconnect the USB cable. Otherwise, you may lose data.