Use a program like WinRAR or 7-Zip to right-click on part01.rar and select "Extract Here." The software will automatically pull data from part09 and all other segments to recreate the full installer or game folder [1, 4].
Since "part09.rar" is just one segment of a larger set, it cannot be opened or "developed" on its own. The Sims 4 (v1.93.129.1030) ALL IN ONE.part09.rar
To successfully use this file, you generally need to follow these steps: Use a program like WinRAR or 7-Zip to right-click on part01
If you are trying to "develop" or modify the game files within that archive, you will first need to complete the extraction above before using tools like Sims 4 Studio to access the internal packages. Ensure you have every single file in the
Ensure you have every single file in the sequence (part01, part02, etc.) in the same folder [1, 2].
If you get a "Checksum Error" specifically on part09, that individual file may be corrupted and likely needs to be re-downloaded [2, 5].