The Sims 4 already keeps several recovery generations next to each main slot, which makes indiscriminate cleanup a mistake. A good backup preserves the whole saves directory, including `.save.ver0` through `.ver4` files. If a slot becomes unusable, duplicate the directory first and test recovery on the copy. Also remember that the Documents tree may be redirected or synchronized by OneDrive, so the file you replace locally may not be the only copy involved.
Identify the exact save you intend to edit
The researched The Sims 4 PC save location is Windows: %USERPROFILE%DocumentsElectronic ArtsThe Sims 4saves | macOS: $HOME/Documents/Electronic Arts/The Sims 4/saves/ | Linux / Steam Play: Steam Play: <SteamLibrary-folder>/steamapps/compatdata/1222670/pfx/. Known file/folder pattern: Slot_*.save
Slot_*.save.ver0 … .ver4. Storefront context: EA app, Steam, Epic Games Launcher. The active Windows saves still live under Documents/Electronic Arts. Steam and Epic launch through EA services but should not be assumed to maintain a separate independent save directory. Do not edit a similarly named file from a different profile, edition, or cloud cache.
Make an untouched backup first
Copy the complete saves directory so each main slot and its .ver0-.ver4 recovery generations remain together. Keep that copy outside the live save directory and do not overwrite it with later experiments. Cloud context: OneDrive Documents backup can synchronize or redirect the saves directory when enabled. Treat that as a second copy source when diagnosing unexpected restores. If a launcher can synchronize the save, prevent it from silently replacing either the original or edited copy while testing.
Understand the format boundary
The game maintains main Slot_*.save files and several rotating .save.verN recovery copies. These historical versions are valuable rollback points and should be preserved before manual recovery. File-extension context: .save, .save.ver0, .save.ver1, .save.ver2, .save.ver3, .save.ver4 Compatibility note: The save can depend on installed packs, custom content, and mods. Missing content after migration is not the same as binary save corruption. These facts help identify the save but do not automatically reveal every field, checksum, encryption rule, or version-specific structure inside it.
Use only a Tool whose claim matches the file
Generic viewers and diff tools can inspect bytes without claiming game-specific semantics. A game-specific editor should be used only when its Tool page explicitly lists The Sims 4, a matching supported version/container, and a Verified operational runtime. A planned URL or Game Hub is not evidence that an editor exists.
Test the edited copy safely
Write to a new output file when the Tool supports it, keep the original backup, restore the edited copy into the correct profile/storefront location, and launch the game only after the file operation finishes. If the game rejects it, If a main Slot file fails, preserve it first, then work from a copied .save.verN generation. Do not rename over every version until one recovery copy has been tested. Return to the untouched backup before trying another change.
Verification context: Windows/macOS/Steam Play save paths and storefront/OneDrive context were reviewed against current PCGamingWiki coverage. Rotating Slot recovery filenames follow the standard Sims 4 desktop layout.