This is normal. Because the characters, houses, patterns and other MODs you installed, the patches are stored in them. Game files and photos in the game are also in it. After a long game time, the automatically generated cache file will become larger. The folder should be cleaned. Otherwise, the computer will get stuck (unless your memory is 100 g+). In addition, the sim3package file installed with the actuator (in the download folder) has also been installed, so it is deleted from the folder. If there are any problems, I'll be happy to solve them for you.