The write-up you’re looking for exists—but as a warning, not a guide. There is no working GTA V Android OBB file of 1.8 GB. Anything claiming otherwise is a scam or malware.
The PC and console versions of GTA 5 require roughly 90 GB to 110 GB of storage space. Compressing that massive amount of high-definition audio, dialogue scripts, radio stations, and textures into a 1.8 GB ZIP file is mathematically impossible.
Talented independent developers recreate the prologue map (Ludendorff) or a small section of Los Santos. They use assets ripped from the original game to make it look authentic, but the map boundaries are heavily restricted.
If you already own GTA 5 on a PlayStation 4 or PlayStation 5, you can use the free app from the Google Play Store. This streams the game from your home console directly to your phone over Wi-Fi or mobile data. 3. Steam Link or Moonlight
After extraction, you will get a folder containing the game data.