I went with the 64gb SanDisk Class 10 SD card in the GoPro to hopefully keep up with a 960p continuous video of the ascent and descent. I tested the card and the picture quality by keeping the GoPro running for 4 hours. The picture quality was great! And I only used half of my SD card. I also added a Bacpac extended battery to the GoPro which still had a bar of juice left after 4 hours. Hopefully everything will go as planned during the actual launch and the cold temps at 110,000 feet.
The 8gb SanDisk SD card in the Flight Computer should be more than enough to capture the entire flight's data. The Flight Computer will record temperature, pressure, altitude, and longitude and latitude. All of these data points will give us a great picture of where the balloon went on its journey! The data we receive will look like this: