SpaceX’s laser system for Starlink is delivering over 42 petabytes of data for customers per day, an engineer revealed today. That translates into 42 million gigabytes. Each of the 9,000 lasers in the network is capable of transmitting at 100Gbps, and satellites can form ad-hoc mesh networks to complete long-haul transmissions when there are no ground towers nearby (like when they’re going across oceans).
Please keep in mind that it is an average cable, that exists today, the new ones are faster. This is also under sea, where the traffic is smaller than on continent. Also, this is just one cable as opposed to the whole network. Overall, the starlink traffic is tiny.