If you are loading the micro SD card using a SD card adapter, slide the lock button on the left side up to the unlock position. Some cards may still have problems with some readers. If so, cover the slide lock notch with tape and retry. If the card was previously used in a camera, phone or other device, it may have files on it that write protect it. In this case and probably a good idea anyway is to reformat it when you get the hardware lock cleared.