I'm having trouble recording video on my recently purchased Typhoon H Plus. I'm a new Yuneec owner, and I inserted a brand new San Disk 4k SD card into the card slot on the ST16s controller. Then I turned on the ST16s controller, then turned on the drone and launched it. I then pressed the right side black colored "video" button on the ST16s controller then pressed the red record button on the on-screen controller. After I landed I turned off the video, then turned off the drone then turned off the ST16s. Later when I pulled the SD card, it was blank, no files, no data, nothing. Can someone tells me how to record video in easy layman's terms please. I do not know how to do a screenshot on the ST16s controller. Additionally and unrelated, the drone keeps drifting, either up or sideways even when i set the controller down and am not touching it.