Brother MFC-J220 Basic User's Manual page 58

Chapter 9
PHOTO CAPTURE key indications:
 PHOTO CAPTURE light is on, the memory card is correctly inserted.
 PHOTO CAPTURE light is off, the memory card is not correctly inserted.
PHOTO CAPTURE light is blinking, the memory card is being read or written to.

IMPORTANT
DO NOT unplug the power cord or remove the memory card from the media drive (slot) while
the machine is reading or writing to the memory card (the PHOTO CAPTURE key is blinking).
You will lose your data or damage the card.
The machine can only read one device at a time.
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