.ZS4 File Extension
File TypeZSNES Slot 4 Saved State File
What is a ZS4 file?
Save state file created by ZSNES, a Super Nintendo Entertainment System (SNES) emulator for PCs; stores a saved game snapshot that can be loaded at another time; used to save and load game progress.
NOTE: ZSNES save states are not the same as in-game save states. An in-game state may only be created when arriving at specific game milestones whereas ZSNES save states can be created at any time during gameplay.