This is a complicated question to answer — certainly more complicated and less straightforward than you might think at first. The answer depends on a variety of factors. For one, there’s how long your material will be in terms of running time. Then, your format of choice — and finally, how many cameras we’re talking about. So, bear in mind that shooting videos in 4K will take up a huge amount of space — that’s the main reason these cameras require a lot of microSD storage in the first place. For instance, a ProRes file (4K resolution) that’s only a minute long takes a little over five gigabytes of space. With this in mind, you can see just how much space you’ll need to shoot footage with such astounding data rates. Also, simple math leads us to the conclusion that an hour of raw 4K footage will require almost 320GB of storage space.