patriciaholly You need to uninstall the game first, then download it onto the external drive. Alternately, you can move the files to the external (copy and paste, then delete the internal copy), and tell the EA App to download there. But simply changing the App's install location doesn't move the game.
If you don't already have Sims 4 installed, how much free and total space is there on your C drive? And does it help to install only the base game first, then any packs you own afterwards?
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