I have an asus ROG gaming laptop that is couple years old. it is a G750JS-DH71-CA
I have windows 10 64-bit, intel core i7-4710HQ CPU @ 2.50GHz, 12GB ram, and Nvidia Geforce GTX 870M, There are two hard drives, the main OS is 372GB, and Second HD is 537GB.
She has started running slower I find lately and would like opinions on what to buy to upgrade? I would only really want to spend a few hundred dollars, and am not sure if that could make a big difference for me. Any help would be appreciated as I have never built/upgraded a laptop before.