Don't buy cheap SD cards, they can't keep up with the camera. I always buy the SanDisk Ultra's in 2, 16, 32, 64 GB sizes and keep them all with the cam kit I keep in the top trunk. Also, it's a good idea to buy extra batteries, I have 6 total and charge them in the motel room when we stop. If you are recording at highest resolution and frame rate you'll eat up a battery every 60-90 minutes. Last year I bought another housing and drilled a hole in it so I could power it with a USB cord.