The download link you found, , is likely a piece of a pirated version of The Sims 4 .
Leo had been waiting all night for his internet to crawl through the download. He finally had part01 through part10 sitting in his folder. He right-clicked part04.rar —the very file you mentioned—and hit "Extract."
Leo didn't give up. He spent the next three hours on sketchy forums, reading "stories" from other users.