Remove the white cap of the XC Security Camera by turning it slightly clockwise. You should see the micro SD card slot located near the reset button. Gently push the SD card all the way in until you hear that it clicks into place. To remove the SD card, push the SD card in again and it should eject from the slot.
Note: if you inserted an SD card while the device is powered, you would need to restart (power off then on again) the device for the SD card to be recognized.