Questions about MX300

In principle, yes. However, I recommend that when you ask such questions, you always specify which laptop you actually own, then this could be said with a guarantee.

Well, I have everything on 1 ssd and it is much faster than on a hard disk if that was the question. It shouldn't make a (big) difference if you use 2 ssds or put everything on one. the os is used mainly at the beginning when booting and after that hardly or not at all. In any case, I would recommend installing the games on an SSD. However, the M.2 SSD you have chosen is no faster than a standard 2.5"