New computer trying to install all Sims 3 to D Drive

Thanks to each and every one of you awesome people. Very valuable information. Following the instructions carefully, I first noticed I had to click “custom installation” in order to have the option to change the drive letter. The orphanage name, luv it! Ohhh wow! It worked, I’m testing the base game now as it just installed. I’m getting a video card warning though, that it is set too high. I’ll be back if I can’t figure out that one.Thanks so much folks.