Panasonic SD/HDD SDR-H20 Operating Instructions Manual page 24

Before using
∫ Card access lamp
≥ When this unit accesses the SD card (reading, recording, playback,
erasing, etc.), the access lamp lights up.
≥ If the following operations are performed when the access lamp is lit, then
the SD card or the recorded data may be damaged or this unit may
malfunction.
sOpening the card slot cover
sRemoving the SD card
sOperating the OFF/ON switch or the mode dial
sRemoving the battery or disconnecting the AC adaptor
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LSQT1190