X64u.rpf -

Never modify the original x64u.rpf directly in the game folder. If you make a mistake, you will have to redownload the game file.

Never modify the original X64u.rpf directly. X64u.rpf

You cannot simply open x64u.rpf with a standard program like Notepad or WinRAR. To view and replace the files inside, you need a specialized tool: . This is the industry-standard modding tool for GTA V and other modern Rockstar games. It allows you to browse, extract, and import assets in a safe, game-compatible way. Never modify the original x64u