Excuse me - but I am AMAZED no one has said something along the lines of "WHO DECIDED TO PUT SAVE IN My Documents ANYWAY!!!!"
For over 15 years save were put in the game folder. And that was a perfectly acceptable place for them! Now, if you have two drives, as many do, you can forget how the 8 games you have installed on that second drive is all saving to the system drive!
Someone should write a little program that allows you to put in where the game folder is, put in where the saves are saved, and then periodically cut them from the My Documents and put in a Saves folder in the game folder. This way, at any one time, the bulk of your save will be in the game folder!
Between saves always going to the system drive and Steam only letting you save to the partition the Steam folder is, productive disk space is going to be impossible! This is yet one more reason why so many more people (like me!) are playing retro PC games more and more from GOG.com and other sources!