For fps, I have gyro turned off and have it set to enable only when I hold the left trigger to zoom in. I primarily use my right stick to center the target on my screen, then ads and use the gyro to fine tune my aim.

Either is fine. It depends on your comfortability with opening the deck up and swapping the ssd. Running games off of the internal storage will always perform equal to or better than running them off of a micro sd. The most noticeable difference will be the faster loading times off of the internal.

Decky loader