Skyrim Special Edition backups should include mod context, not just bytes. The base .ess file is the core save, but SKSE installations can add a matching .skse cosave and the save can reference plugins that are no longer installed. That means a technically intact file may still fail or behave differently on another setup. SaveEditor.com therefore treats the save file, its optional cosave, and the mod/load-order context as separate pieces of compatibility evidence.
Identify the exact save you intend to edit
The researched The Elder Scrolls V: Skyrim Special Edition PC save location is Windows: Steam: %USERPROFILE%DocumentsMy GamesSkyrim Special EditionSaves
GOG: %USERPROFILE%DocumentsMy GamesSkyrim Special Edition GOGSaves | Linux / Steam Play: Steam Play: <SteamLibrary-folder>/steamapps/compatdata/489830/pfx/. Known file/folder pattern: *.ess
*.skse (when created by SKSE). Storefront context: Steam, GOG Galaxy, Epic Games Launcher, Microsoft Store / Xbox app. Steam and GOG use differently named Documents folders. Microsoft Store packaging differs and should not be treated as the same path simply because the game title is identical. Do not edit a similarly named file from a different profile, edition, or cloud cache.
Make an untouched backup first
For an unmodded setup, back up the complete Saves folder. For SKSE/modded play, preserve matching .ess and .skse files plus a record of the mod list/load order. Keep that copy outside the live save directory and do not overwrite it with later experiments. Cloud context: Steam Cloud, GOG Galaxy, Epic/Xbox cloud support, and optional OneDrive Documents backup can all affect which copy is restored. If a launcher can synchronize the save, prevent it from silently replacing either the original or edited copy while testing.
Understand the format boundary
Base saves use .ess. Modded installations using SKSE can create a paired .skse cosave with the same base name. Treat paired files as one restore set when the mod stack depends on them. File-extension context: .ess, .skse Compatibility note: Original Skyrim saves can sometimes be used by Special Edition, but modded saves may fail when required plugins are missing or incompatible. 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 Elder Scrolls V: Skyrim Special Edition, 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, When a save fails after moving PCs, check the mod/plugin environment before assuming the .ess itself is corrupt. OneDrive can also redirect or synchronize the Documents folder unexpectedly. Return to the untouched backup before trying another change.
Verification context: Steam/GOG save paths, original-to-Special-Edition compatibility note, cloud support, and Steam Play behavior were reviewed against current PCGamingWiki coverage.