What is .ZS4 file extension?
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.
You can see a list of software programs here on www.easyfileopener.org that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.