Why? Because MGS4 is a massive file. The game clocks in at approximately (dual-layer Blu-ray). Google Drive’s free bandwidth limits and Google’s aggressive hash-matching for copyright infringement mean that any public link is usually taken down within hours.
The marginally legitimate find. You might find a folder containing hundreds of .part files or a massive 50GB .iso file. This is likely a "Jailbreak Folder" (JB) format originally ripped from a modded PS3 console. metal gear solid 4 rom google drive