All PS4 Games "Must" be Cached to the Hard Drive "To Ensure a Smooth Gaming Experience" - PlayStation LifeStyle

All PS4 Blu-ray Disc games must be cached to the hard drive to ensure a smooth gaming experience. However, certain titles may not require you to wait for the game data to be fully cached before starting gameplay. In order to start playing disc-based games, users will need to insert the game disc into PS4 just like on the PS3 system.