No, not truly. You cannot retain "extra quality" in an install folder of only 300MB. High-quality textures alone require more space than that.
"Ah shit, here we go again."
For a smooth and high-quality experience, it is recommended to use the full version. Standard PC Version : Requires a 1GHz processor and 256MB of RAM. Safe Sources : Look for reputable platforms like Rockstar Games gta san andreas pc highly compressed 300mb extra quality
Because it is optimized, this version runs smoothly on older laptops and budget PCs with integrated graphics. Review: GTA San Andreas PC Highly Compressed 300MB