It doesn't even make any sense outside of a philosophical conversation about consciousness.

"Uploading your brain" would essentially be a copy of your brain. There'd be no reason you couldn't just do this and live to tell the tale, and you'd quickly realize you don't experience uploaded you. Either proving consciousness or some other force being what "you" really are.

Hell, you could create a 100% accurate clone of yourself and when you die you die. You don't get to experience clone you.

Consciousness isn't as arbitrary as some people would like to believe.