Opticon H21 - Manual (Page 27)

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1.11. Micro SD Cards
The H-21 contains a micro SD card slot for expanding the device’s memory. It has support for both
standard and high-capacity SD cards (SDHC)
1.11.1.
Inserting a Micro SD Card
CAUTION!: Inserting the micro SD card in the wrong direction can cause damage to the card and
the device.
Step 1:
Remove the battery cover and remove the battery. See "Removing the Battery Cover" and
"Removing the Battery" for details.
Step 2:
Slide the SD card lock upwards
Step 3:
Lift the micro SD card slot cover and insert the micro SD card with the logo side down.