claimed part04 was uploaded by a different person and you need a specific password hidden behind a survey link.
Files named like this (especially multi-part .rar files from unofficial sources) frequently contain malware or miners that can slow down your computer or steal your data.
In the community of people who download these types of files, "stories" often refer to the unexpected technical or personal sagas that come with trying to get them to work. Here is a story of what typically happens when someone tries to open a file like that: The Missing Piece Los.Sims.4.v1.92.145.1030.part04.rar
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."
just posted: "It works for me! Thanks!"—which offered Leo no help at all. The Conclusion claimed part04 was uploaded by a different person
For a second, it looked like it was working. Then, the progress bar turned red: The Rabbit Hole
Leo didn't give up. He spent the next three hours on sketchy forums, reading "stories" from other users. Here is a story of what typically happens
After re-downloading part04 three times, Leo finally got the game to launch. He spent forty minutes carefully crafting a Sim that looked exactly like him, only for the game to crash the moment he tried to buy a refrigerator. He realized that while the file was "free," the "story" of trying to fix it cost him an entire Saturday.