Persona 4 Golden illustrates why a save “slot” can be more than one file. Steam stores data under app ID 1113000, and documented cross-platform workflows pair each dataXXXX.bin with a companion .binslot structure whose checksum may need to agree. A backup of only the visibly largest file is therefore incomplete. SaveEditor recommends copying the whole remote directory first, then treating any conversion or editor workflow as a separate operation on duplicates. Microsoft Store is again represented by WGS and is not presented as drop-in compatible.
For this PC reference, the documented storage is Windows: Steam: <Steam-folder>userdata<user-id>1113000remote ; Microsoft Store: %LOCALAPPDATA%PackagesSEGAofAmericaInc.D0cb6b3aet_s751p9cej88mtSystemAppDatawgs<user-id>. The known file or folder pattern is Steam commonly uses dataXXXX.bin with corresponding dataXXXX.binslot metadata; cloud metadata also resides in the remote directory.. Steam stores the save set under app ID 1113000. Community-documented Vita/PC and edited-save workflows note a checksum relationship between dataXXXX.bin and dataXXXX.binslot. Microsoft Store uses WGS.
Backup guidance: Back up the entire 1113000remote directory before changing a slot. Preserve the matching .bin/.binslot files and cloud metadata together so the original pairing can be restored. Steam Cloud and Xbox Cloud are documented. Launcher and cloud context matters because A .bin slot and its .binslot metadata should be treated as a pair. Microsoft Store WGS transfer is a separate conversion problem, not a simple rename.
Compatibility and recovery should stay conservative. Edited or cross-platform slot data can fail if companion checksum metadata no longer matches. Avoid mixing a .bin from one snapshot with a .binslot from another. If the expected progress is not visible, If a slot warns or fails to load, restore the matching pair. When moving from Microsoft Store, verify the transfer workflow for the current game version instead of treating WGS blobs as Steam files. 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.