For New Vegas, the save file is only part of a reproducible modded setup. Back up the entire Saves folder and separately record the active mod list before changing load order or moving progress to another PC.
Where Fallout: New Vegas stores PC saves
The researched save-location boundary is Windows: %USERPROFILE%DocumentsMy GamesFalloutNVSaves. The known file or folder pattern is *.fos save files plus paired metadata/backup artifacts when present. This is the practical starting point because launcher, profile, and storefront context can change which copy is active even when two folders look similar.
Storefront and profile differences
Documented launchers or storefronts: Steam, GOG, Epic Games Store, Microsoft Store. The active Steam, GOG, Epic Games Store, Microsoft Store installation determines which local profile and cloud copy can overwrite the save. Identify the storefront and account before restoring files. When looking for a missing save, identify the executable/storefront you actually launched and the user/profile that created the progress before copying anything between directories.
Cloud synchronization
Cloud support differs by storefront; keep an offline copy of the Saves folder and the mod/load-order context for modded games. A cloud service should be treated as another copy of the save, not as proof that the local folder is disposable. Before a manual restore, let synchronization finish, make an offline backup, and avoid starting the game while files are being replaced.
What the files represent
New Vegas uses Bethesda Gamebryo save records with the .fos extension. Mods, DLC, load order, and script state can be embedded in progress, so a byte-level file match does not guarantee a safe modded restore. The current filename/folder evidence is *.fos save files plus paired metadata/backup artifacts when present. File-extension context: .fos A location guide does not claim that every file in the directory is safe to edit or that files from another storefront are automatically interchangeable.
If the save is not where expected
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. Also check redirected Documents folders, Steam Play prefixes, account IDs, and launcher-specific containers where applicable. Preserve every candidate copy before testing a restore so troubleshooting does not destroy the only surviving version.
Verification context: Windows save location, file-boundary, launcher/cloud, and backup notes were reviewed against the linked game-specific references for Fallout: New Vegas. This Game Hub is documentation only and does not claim a new game-specific Save Editor.
Recorded Phase 40 evidence boundary
This Phase 40 entry is grounded in the researched PC save boundary for Fallout: New Vegas: Windows: %USERPROFILE%DocumentsMy GamesFalloutNVSaves The recorded file or folder pattern is *.fos save files plus paired metadata/backup artifacts when present. These concrete identifiers are retained so backup, transfer, recovery, and editing preparation remain tied to the documented game/storefront context instead of a generic extension guess.