Game Performance Using Different Storage Media
From the data collected, storage devices have little to no impact on performance while the game is running. Where it impacts the most is where there’s lots of loading, such as starting a new game, loading a new level, or loading from a save file.
Games with smaller maps to act as game levels, such as first-person shooters, strategy games, and action games, can remain on an HDD without fear of performance loss during gameplay.
Detailed open-world games, such as GTA V and Fallout 4, should be on an SSD, and games that you’ve heavily modded.