I'm having difficulty finding a Independent Portable 4K Capture Device that Records at 4K 60fps to SD or MicroSD.
By independent, I mean it does not require a computer; it is its own computer by itself.
By portable, I mean that I don't want something as large as PC tower.
I want perfect pass-through 4K 60fps quality while viewing what I'm recording live, and I want the exact 4K 60fps quality while viewing what I've recorded. I expect this to be expensive; that's ok.