Monster Hunter: World keeps its main Steam PC progress in SAVEDATA1000. Because the file sits under an account-specific Steam userdata tree, the account context belongs in the backup record. Copy the file outside Steam before major changes and keep multiple dated revisions rather than relying on cloud synchronization alone. A future editor must handle account/profile semantics explicitly; Phase 23 only documents where the file lives and how to preserve it safely.
Choose the correct backup boundary
For Monster Hunter: World, the researched PC save location is Windows: <Steam-folder>userdata<user-id>582010remote | Linux / Steam Play: Steam Play: <SteamLibrary-folder>/steamapps/compatdata/582010/pfx/. The known save file or folder pattern is SAVEDATA1000. Copy SAVEDATA1000 to a dated location outside Steam userdata. For extra context, record the Steam account/ID that produced the file. Copying the complete documented save boundary is safer than selecting one visually obvious file, because companion metadata, indexes, backups, or multiple slots can be required together.
Make an offline copy before changing anything
Close the game first, wait for the active launcher to finish writing, then copy the save data to a separate folder that the game and sync client do not watch. Label the copy with the game, storefront, profile, and date. Documented launcher context: Steam. The save is under Steam userdata, not the Monster Hunter: World installation directory. The numeric user folder identifies the Steam account context.
Account for cloud saves
Steam Cloud/remote storage is part of the normal PC workflow. Manual backups are still valuable because a damaged local revision can also synchronize. Before restoring an older backup, decide which copy should win. If the game or launcher starts while an older manual copy is in place, synchronization can replace it before you confirm that it works. Keep the untouched backup outside the live save path until the restored progress has been opened and saved normally.
Restore without changing format assumptions
The Steam PC profile uses the SAVEDATA1000 file under app 582010 remote storage. The file contains account/profile progress and should be treated as user-associated data rather than an anonymous portable save. Compatibility note: Third-party save transfers often need Steam-ID-aware handling. This Game Hub does not claim that a SAVEDATA1000 file from another account is directly portable. Restore into the matching storefront/profile context whenever possible. Do not rename a save extension, move a folder into a different container type, or assume a console/mobile copy is equivalent unless a tested migration path specifically says so.
Recovery fallback
If progress is missing after a cloud conflict, preserve both the current remote/local file and any backup before trying replacement. Avoid repeatedly launching the game while deciding which copy is authoritative. If the restored copy fails, put the untouched original back first. Then compare location, account/profile, cloud state, and the full directory structure before trying a different backup. The objective is reversible recovery, not repeated destructive experiments on the only copy.
Verification context: The Steam userdata path was reviewed against current PCGamingWiki coverage. SAVEDATA1000 naming is corroborated by long-running Steam/Nexus backup references.