Move Steam Folder. Start Steam and log in to your existing. That's because Steam didn't have a baked-in feature for moving games without reinstalling them.
At the top and add the new location. It is however possible to do just that with some manual work. Move the SteamApps folder into the new Steam installation folder to copy all of your downloaded game content, settings, and saved games to the new location.
To move a Steam Game to a new installation, open the app, click "Steam" in the top left, click "settings", click "downloads", click "steam library folders", click "add library folder", setup the new path.
Move Steam Games to the SSD by Copying Steam Games Folder.
Go to "Steam" > "Settings" > "Downloads" and click on "Steam Library Folders". Create Steam content folder on second disk drive. It says something like "can't find Steam, did you move it?" and than you can choose the new folder location.