What is .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.
ZSNES provides numerous save states from 0 to 99 (file extensions .ZS0, .ZS1, .ZS2, and so on).
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.
Recommended Software Programs to open .ZS4 file