It's not very dense at the moment, around 600KB per frame IIRC, with lots of redundancy and while staying really easy to read even with DIY hardware. They think

It's not very dense at the moment, around 600KB per frame IIRC, with lots of redundancy and while staying really easy to read even with DIY hardware. They think they should be able to cram about 2MB per frame without compromising durability and without any compression (but lots of in-picture redundancy). That should give about 200 GB per roll of film (the large ones).