Assuming you extracted a vanilla x64e.rpf from a friend's legitimate Steam backup (which is legally gray but common among modding communities), here is how to install it:
For more technical details on archive structures, you can visit the GTAMods Wiki. Gta V X64.rpf Files Download
The launcher will automatically download a clean, official version of the missing file. 2. Using OpenIV to Safely Mod RPF Archives Assuming you extracted a vanilla x64e
If you crash when entering a car, you need to restore x64e.rpf . If you crash when switching characters, focus on x64b.rpf . Using OpenIV to Safely Mod RPF Archives If
If you need help extracting or editing x64.rpf for modding, use OpenIV and only work with a copy inside the mods folder. For missing files, always rely on your game launcher’s repair function.
Downloading .rpf files from forums or "free download" sites is highly discouraged for several reasons: Archives are common vessels for trojans.