I've searched and can't find an answer so am asking for help. Just got my P3A and ordered the charging hub and extra batteries. I sure hope the DJI is a much better quality than the instructions they give you. How do you upgrade the firmware for the hub? I've downloaded and unzipped the file to my Windows laptop - can't use my Android tablet has it has no USB port. Can somebody give me simple steps on what to do next? I'm normally not this inept but am pleading for kindness and help! Thanks!