What do you consider "in flight"? There's an old joke from Tanenbaum: "Never underestimate the bandwidth of a station wagon full of tapes hurtling down the highway."
And while it was very much not a high-capacity technique, you might find the mercury delay-line memory used by early computers interesting if you haven't heard of it before.
Seems like earth satellites might have huge pipes, but the data arrives too quickly to build up.
Maybe 94GB would do it.