Brother MFC-J5910DW Basic User's Manual page 66

Chapter 9
IMPORTANT
DO NOT insert a Memory Stick Duo™ into the lower SD slot. Doing this may cause damage
to the machine.
PHOTO key lights:
 PHOTO light is on, the memory card or USB Flash memory drive is properly inserted.
 PHOTO light is off, the memory card or USB Flash memory drive is not properly inserted.
 PHOTO light is blinking, the memory card or USB Flash memory drive is being read or written
to.
IMPORTANT
DO NOT unplug the power cord or remove the memory card or USB Flash memory drive from
the media drive (slot) or USB direct interface while the machine is reading or writing to the
memory card or USB Flash memory drive (the PHOTO key is blinking). You will lose your
data or damage the card.
The machine can only read one memory card or USB Flash memory drive at a time.
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