Jim
Thanks, that video was very interesting.
Looking at specs at zoom site I see it will take up to 512GB SDXC card, that's a lot of record time (~21.5 hours) at max everything, or with 256 GB card (10.75 hours), 128GB (~5.5 hours), or even a "lowly" 64GB card (~2.7 hours) at max specs.
OK math in public (approx) time: Full means: 24 bit (aka 3 bytes) * 96K (samples per second) * 12 (channels) * 2 (can be stored as stereo wav) * 3600 (for 60 seconds in a minute by 60 minutes in an hour) = 24,883,200,000 bytes per hour or ~ 23.2 GiB/hour (a computer GB [aka GiB] is 1,073,741,824 bytes not 1,000,000,000)
or simply go here to check my math
https://www.sounddevices.com/tech-notes/audio-record-time-calculations#Might end up with one of these
Larry