The HD Remaster is one PC product but it contains several distinct save contexts, so backing up only the first save-looking file is risky. Steam places the collection under one Documents root; Microsoft Store uses WGS. SaveEditor recommends preserving the collection root and labeling the backup with which component game and slot were active. That matters when troubleshooting because Final Fantasy X, X-2, and Last Mission can each have their own progress while sharing the same installation and launcher.
For this PC reference, the documented storage is Windows: Steam: %USERPROFILE%DocumentsSQUARE ENIXFINAL FANTASY X&X-2 HD Remaster ; Microsoft Store: %LOCALAPPDATA%Packages39EA002F.FFXX-2HDRemaster_n746a19ndrrjgSystemAppDatawgs 009000000B904E5_0000000000000000000000006038DDC9<container>. The known file or folder pattern is Separate game-specific save data exists beneath the remaster root for Final Fantasy X, X-2, and Last Mission.. The collection contains multiple games under one product. Steam uses the Documents tree while Microsoft Store uses a WGS container. Steam Cloud quotas are tracked separately for FFX, X-2, and Last Mission.
Backup guidance: Copy the whole FINAL FANTASY X&X-2 HD Remaster directory on Steam so all game-specific subfolders and system data remain together. For WGS, preserve the complete container tree. Steam Cloud and Xbox Cloud are documented; OneDrive can also synchronize the Documents root when enabled. Launcher and cloud context matters because Do not assume a save from FFX belongs in the same subfolder as X-2 or Last Mission. Microsoft Store container names are not user-friendly filenames.
Compatibility and recovery should stay conservative. A backup for one title in the collection should not overwrite another title’s data. Steam and Microsoft Store use different storage containers even when the underlying game progress is related. If the expected progress is not visible, If a save appears absent, confirm whether you launched X, X-2, or Last Mission and whether OneDrive/Steam Cloud restored a different Documents copy. Microsoft Store users should verify the correct WGS account container. 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.