Use the 952060 app-specific directory as the identity boundary for RE3. Keep a dated copy of the full win64_save directory before replacing any record.
For this PC reference, the documented storage is Windows: <Steam-folder>userdata<account-id>952060remotewin64_save. The known file or folder pattern is Capcom win64_save records for the Steam release. Resident Evil 3 uses its own Steam app userdata path with a win64_save container. Similar RE Engine filenames are not cross-game compatibility evidence.
Backup guidance: Close Resident Evil 3 (2020), let the launcher finish any synchronization, then copy the complete documented save directory to a dated folder outside the live path. Preserve companion files rather than selecting only the newest-looking record. Steam Cloud can synchronize the remote folder; complete synchronization before taking or restoring a manual backup. Launcher and cloud context matters because The active Steam installation determines which local profile and cloud copy can overwrite the save. Identify the storefront and account before restoring files.
Compatibility and recovery should stay conservative. Treat saves as version-, storefront-, account-, and mod-sensitive unless the game or a separately verified migration workflow proves otherwise. A similar filename or extension is not evidence that two releases are interchangeable. If the expected progress is not visible, If progress is missing after a restore, confirm the active Windows account, storefront/profile, cloud state, and exact directory first. Restore the untouched backup before experimenting with individual files or older autosaves. SaveEditor.com only labels a game-specific editor as available when a separate linked Tool has a verified operational runtime; this reference page by itself is not an editor claim.