Pipes of Infinity
In the end, that data was the “equivalent to 5000 years of mp3 files” according to Dan Marrone, an astronomer and co-investigator of Event Horizon Telescope. It was recorded onto half a ton of hard drives and then physically sent to centralized locations where it was analyzed by supercomputers for months in order to get the image we see today.
Source: See the first image ever taken of a supermassive black hole – The Verge