Question: how much 4k video fits on 64gb?
Answer: The SD cards aren't cheap but that's one of the costs of shooting 4K footage. The 16gb is$ 75 and will get 10 minutes of 4K footage. The 32gb is $130 and will get 20 minutes of 4K footage. The 64gb is $245 and will get 40 minutes of 4K footage.