Death Adder

I recently bout a Huntsman Mini and Death Adder V2 to use with my PS4 Pro. My questions are:

Does the PS4 Pro support on board memory from the mouse if I were to make custom DPI profiles? Or will it always go back to the 4 preset DPI settings?

Also, how do I switch DPI profiles on the mouse? Do I just click the two buttons behind the scroll wheel? The light on the bottom didn’t change when I clicked the buttons.

I’m unfamiliar with gaming mice and omeglz how they work.