Ensure your custom firmware has the latest Sigpatches installed, or the game may fail to launch with a "corrupt data" error after the update.
Ensure you have every required segment ( part1 , part2 , etc.) in the same folder on your PC. GTAVC-(USA)-NSwTcH-NSP-Update107-Ziperto.part1.rar
Right-click only part1.rar using a tool like WinRAR or 7-Zip . Ensure your custom firmware has the latest Sigpatches
Note: Always install updates to the same location as the base game (e.g., both on SD card). both on SD card).