Same here, constant screeching(and red led on gimbal's front) means firmware update failed. I couldn't update mine either. I believe we need separate topic for those who screwed up with ftp hack, maybe we'll find a solution in this wayThanks guys. I've installed the bin file to the root directory and powered up the drone. I have flashing yellow lights and constant screeching sounds! I've left it like this in the hope it's reinstalling the firmware? I don't remember these noises before. Not like this anyway!