GPSaveConverter app converts Xbox Game Pass saves into PC format and viceversa
Aside from exclusives and classic titles, Game Pass also offers newly released titles into the service, and a variety of them are multiplatform games, some of which are available in other storefronts like Steam, GOG or others, and while some do their gaming solely on one system or the other, there's always users that like to switch up where they play, either for convenience's sake or necessity. But rarely do service devs offer the option to backup saves, and even more rarely to allow for cross-play options that carry over saves between systems.
This is where developer Fr33dan took action and jumped in with an application to help with that scenario. "Game Pass Save Converter" (or GPSaveConverter) is an application that allows converting save files from Game Pass into versions of the game purchased through other storefronts, and not only does it allowing for carrying over save files from Game Pass into other storefront versions of the same game, but it also allows doing it the other way around, making it possible to transfer saves from the storefront of choice, to Game Pass. Additionally, the converter also allows for player profiles, if the storefront does have multiple, so the application will show the game profiles for conversion as well.
As with anything involving modification of files or data, be sure that if you're going to do a save transfer between systems, to always back them up in case something odd might happen in the process of conversion.
Game Pass Converter description said:PC Gamepass Save File Converter
Games available through PC Game Pass or purchased via the Xbox app keep their save files in an arbitrary file structure. This means if you purchase a game on another storefront moving your save files to or from the Xbox version is extremely difficult. This software aims to make that process easy.
Finds games by listing any Microsoft Store package with a wgs folder (believed to stand for "Windows Game Save"). This means some non-game applications may be shown
There is an extremely small (as of now at least) game library that contains the locations of non-Xbox save files. Some other game storefronts/save systems support multiple profiles, if this is the case with your game profiles will be shown by the file name identifying them. If your game is not found in this library you will be prompted to select the location manually when a package is selected.
It is strongly recommended you back up both save file folders before using this application.
GPSaveConverter GitHub Repository