To use a .part13.rar file, you generally need a tool like WinRAR or 7-Zip . Open Part 01 and the software will automatically pull data from all other parts to recreate the full installer.
Since modern versions of GTA V are roughly , fans often split the installer into smaller "parts" (like .part01.rar through .part50.rar ) to make downloading easier on slower connections. ⚠️ Important Safety Warning Grand.Theft.Auto.V.part13.rar
You cannot open "part 13" on its own; you must have every single part in the sequence (usually in the same folder) to extract the game. To use a
Minimum 4GB-8GB RAM and a dedicated graphics card (NVIDIA 9800 GT or better). To use a .part13.rar file