Epson CX6500 Reference Manual page 372

Make sure that the CX6500 is not accessing the memory card (the memory card slot light is not
flashing), then eject the memory card by pulling it straight out of the slot after printing is
finished.
Caution:
Do not remove the memory card or turn off the CX6500 while the printing or while the
memory card light is flashing. Data on the memory card may be lost.
If you are using the CX6500 with a computer which has Windows 2000 or XP installed,
never turn it off or disconnect the USB cable with a memory card inserted in the card slot;
this may destroy data on the memory card. See
for details.
Disconnecting or Turning off the CX6500
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