I am new to all of this and was wondering if someone can tell me how much space will be used per minute of video. I am using a 32 GB card. I would like to film at the highest quality. How much space per minute would this use? I have 3 batteries for flight so I am wondering if I should purchase a 2nd card. I also have the original 4 GB that came with it. This is for the Phantom 2 Vision Plus V3.0. Thanks for any input.