Let folks know in the morning.. Just cleared out all the memory on my switch and have it downloading. No micro SD. It says save files need 5 gigs but I doubt that. They aren't that big on Xbox.
Guessing I'll need the SD card for patches and what have you, but curious to see if I can run the full game as is without it.
The save file is 3GB big in case you missed it.
That's why you might not be able to play it with just internal storage.