For Resident Evil 4 (2023), the critical backup context is the account-scoped Steam directory. Copying one .bin file without knowing which Steam identity and folder it came from can create a misleading sense that the save is portable. The safer backup is the complete win64_save directory plus a note of the Steam account. On macOS, preserve the entire CAPCOM SaveData directory instead. SaveEditor.com records the user-ID binding because it directly affects restoration and future editor compatibility.
Known Resident Evil 4 save-file structure
The researched filename or folder pattern is win64_save directory records. File-extension context: .bin The documented format notes are: The 2023 Resident Evil 4 remake stores Steam PC saves in the account-scoped win64_save directory. PCGamingWiki notes that saves are tied to the Steam user ID.
Why an extension is not enough
A save filename can identify a likely container, but it does not prove the internal schema, game version, checksum rules, encryption state, or editability. Steam saves are account-associated. A file from another Steam identity may require a dedicated account-aware conversion workflow; this Game Hub does not claim direct portability. SaveEditor therefore separates file identification from Tool compatibility and only labels a game-specific Tool Verified when its exact profile/version evidence passes the runtime gate.
Where the format is stored
PC save locations: Windows: Steam: <Steam-folder>userdata<user-id>2050650remotewin64_save | macOS: $HOME/Library/Containers/jp.co.capcom.RE4US/Data/Library/Application Support/CAPCOM/jp.co.capcom.RE4US/SaveData | Linux / Steam Play: Steam Play: <SteamLibrary-folder>/steamapps/compatdata/2050650/pfx/. Storefront context: Steam, macOS App Store. The Windows/Steam and macOS container paths are different. Keep account/profile context with the backup instead of treating isolated .bin files as anonymous portable saves. This matters because two releases can use different containers or companion files even when the visible slot name is similar.
Back up before inspecting or editing
Back up the complete win64_save directory for Steam, or the complete SaveData directory on macOS. Record the account that created the backup. A read-only viewer is lower risk than a writer, but the live save should still be copied first. Cloud context also matters: Steam Cloud is documented for saves and most settings. Keep the original bytes available so any experiment can be reversed without relying on a cloud service or automatic backup.
What this reference does not claim
This page does not infer an undocumented checksum algorithm, encryption key, compression layer, or cross-store conversion from the file extension. Troubleshooting evidence: If copied saves are ignored, restore the untouched original and confirm account ownership, folder level, and cloud synchronization before attempting another replacement. Those questions require a verified parser/profile or a game-specific source, not a generic format guess.
Verification context: Steam, macOS, Steam Play paths and account-binding notes were reviewed against current PCGamingWiki coverage for Resident Evil 4 (2023).