pvs193

On the bottom left, click on the button called "Add Library Folder" In the window that pops up (which says "Create or select new Steam library folder") - click the downward pointing triangle on the top right, this shows you a list of drives. - click on the drive you want to use - click on New Folder to create a folder (default name is SteamLibrary), name it and click okay (you must create a folder, you can't set the root drive) - click Select. Your new Steam library folder should appear in the list. When you next install a game, you'll have an option to "Choose location for install" (you can create a new library from there too). Hope this helps.

A small but useful point, you don't have to install FSX-SE in the default Steam folder. You can set up additional library folders to install games in different places. I prefer to have FSX installed on a separate dedicated drive. It's easy to do that with Steam. Go to Steam - Settings - Downloads Underneath Content Libraries, click on Steam Library Folders This opens a window where you can add new Library Folders. Set up one for FSX-SE wherever you like, e.g. on a different drive. Whenever you install a new game on Steam you can then choose where to install it.