Command & Conquer 3: Tiberium Wars

Save Location

Shell: Path

shell:personal\Command & Conquer 3 Tiberium Wars\Profiles\

Path With Environment Variable

%userprofile%\My Documents\Command & Conquer 3 Tiberium Wars\Profiles\ 

I found my saved games (Windows 10) at: 

C:\Users\Username\Saved Games\Command & Conquer 3 Tiberium Wars\GameProfileUserName