I mean, it’s not appropriate. I am real world your phone would max out and be full after just a couple of minutes. If you’re a person who actually uses pro res, or any cinematographer, you would never get a 128 device.
So the threshold between a real cinematographer and a fake one is 128GB vs. 256GB?
If you only need to capture 15 minutes of ProRes 4K for an advertisement, you're fake?
How about a simple warning in the app: "You're out of free space."