Direct Answer: A legitimate 500MB "highly compressed" version of for PC does not exist. Grand Theft Auto V requires at least 72GB to 105GB
Why a legitimate 500MB GTA V doesn’t exist
If you are trying to make a 500 MB file work, it is impossible to "fix" it into a full game because the actual data (textures, models, and world maps) simply isn't there. Step 1: Delete the file
Instead of downloading risky compressed files, you can improve performance using official settings and reputable mods:
Fix:
Use a tool like WinRAR and select the "Keep broken files" option during extraction. Note that this often leads to a game that crashes as soon as you start the first mission. 3. Social Club/DirectX Errors