I found this article by limiting my search to URLs created in the last month to find the most current information about this. I don’t know why, but I do not have these options to select and to move the installation directory. I use Windows 10 and no matter what I do Steam insists on putting all my games in c:\Program Files (x86). I can select a second drive in Steam> Settings> Storage. But if I try to point to a different directory on c:\ Steam ignores that and puts everything back in Program Files.It looks to me like Steam has decided not to allow users to move their installation on c: (I understand why they would want to do this). But I am puzzled how the information in such a recent article can be so different from what I see in Steam. Is this some kind of Steam Premium feature? Or is your article already out-of-date?
Where Are Steam Games Stored and How to Change Their Location
If you are new to Steam and have no clue where are Steam games stored, here's a quick way to know and change their location quickly.