So, in order to install it to another location, you must install it in C:\ first. There are many good reasons why you might not want to have The Sims 4 installed on your primary C:\ partition. It'll always install to C:\Program Files (x86)\Electronic Arts\The Sims 4\ and give an error if you try to install it to another location.
As you might have already noticed - you're reading this page after all - for some reason it's not possible to change the installation location of our The Sims 4 torrent.