In a standard GTA V installation, x64v.rpf is one of several alphabetised archives (ranging from x64a.rpf to x64w.rpf ) found in the root directory. This specific file is well-known in the modding community for containing:

Modders use specialized tools like OpenIV or CodeWalker to decrypt and browse the contents of RPF archives.

To prevent corrupting the original game files or being banned from GTA Online, users are encouraged to use a "mods" folder . When using the OpenIV ASI Manager , you can copy the original x64v.rpf into a separate /mods/ directory.