Corrupted OBB data can cause system instability.

The search for a under 700MB for Android is a legendary "quest" in the mobile gaming community, but it’s a story that usually ends in a plot twist. Here is the reality behind that 670MB file. The Plot: The "Impossible" Compression

A compressed San Andreas mod fits into 500MB–1.5GB. Hence, 670MB is plausible.

Reports of a download are misleading, as Rockstar Games has never officially released Grand Theft Auto V for Android . The original game requires roughly 120GB of space, and even extreme modding projects that strip away non-essential assets have only managed to compress it to roughly 2.5GB on PC. The Reality of "Highly Compressed" 670MB Files