Why is it that it's always 16GB, 32, 64, 128 for phone storage and such? Why not, say, 20, 30, 50, 75? The amount of data you need to store does not grow exponentially with time, more like linearly. And in real life, we don't double each step and don't buy things in powers of 2. Is 10-pound bag of potatoes too small for you? Buy 15. So, why?