I was trying to get microSD to work with CCR1009 but no luck. In front microUSB flash memory works well to collect logs but the microSD slot is not working. It is physically attached, I didn't measure if there is any voltage on pins. I was using Samsung Evo plus 32GB, I don't have smaller microSD, could it be size limitation? As the port is in brochure and one of features for this device.