Brother MFC-J825DW 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.
Status LED
When the memory card or USB Flash memory drive is being read or written to, the status LED
blinks.
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 status LED 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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