Tbf DOS2 saves do take up a good amount of storage space. I used to have like ~200 saves (for one playthrough) and they took up 2+ GB. This is even more impressive when you compare to Witcher 3 where 100-150 saves take up only 150-300 MB.
It's funny though, cause the other day when I found out how much space DOS2 saves cost me, I tried deleting most of them, and guess what, when I started the game with GOG client, the backup feature would restore every single save that I deleted. Ugh.
