They should add a Micro-SD card slot to the Quest. Do away with the 64GB which is paltry, and just come out with a 512GB+ internal, with micro-SD card slot for expansion.
Not a bad idea (I say, with no tech knowledge on the subject). In the meantime, just be aware that moving files around manually with your quest hooked to a computer is very easy, so that’s what I do for additional storage.