Command & Conquer 3: Tiberium Wars

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