A black box captures human perspective of extreme conditions. Telemetry, flight control, and maintenance data is more than enough to figure out what happened to

A black box captures human perspective of extreme conditions. Telemetry, flight control, and maintenance data is more than enough to figure out what happened to an aircraft. But, they don't tell why it happened? Data in a black box answers a critical question: "Is it human error?" Having said that, your question does resonate well with me too. How much data does a black box store that we can't send it over satellite (or even to other aircraft nearby-- think of a distributed storage) in real-time or near real-time? The purpose of such distribution is purely redundancy. I haven't seen any concrete numbers or engineering barriers against this idea, yet.