You can do that from the Start menu or by double-clicking on the desktop icon. To add a new game download or install location in Steam, follow the steps listed below. Steps to Change Steam Download/Install Location In this quick and simple post, let me show you the steps to quickly change the default Steam download and install directory. No need to reinstall the entire game catalog.
One of the advantages of choosing a different download location is that even after reinstalling Windows, you can simply point Steam towards the folder and it recognizes the already installed games. If needed, you can add multiple locations for better game categorization. You can change the game download and install location in Steam. Thankfully, Steam offers a simple solution. This is especially true for AAA titles which often exceed 50 GB & 1000 GB limits. The problem with this is that most Windows users will not have enough space in the C drive to install multiple games. i.e, the C drive to download and install the games.
By default, Steam uses the default install directory.