Most modern Windows systems block unauthorized applications from writing to the Documents folder.
Add the save game directory path to the exclusion list: C:\Users\[YourUsername]\Documents\Activision\Prototype 2 . 4. Fix OneDrive Document Syncing Conflicts
Open the Activision folder, create a new folder inside it, and name it Prototype 2 . prototype 2 failed to save data fix
Prototype 2 remains a fan-favorite open-world action game. However, running this 2012 title on modern operating systems like Windows 10 or Windows 11 often presents unexpected technical hurdles. One of the most disruptive issues is the "failed to save data" bug, which completely prevents players from saving game progress or modifying their in-game settings.
Once you fix the error, prevent future loss: Fix OneDrive Document Syncing Conflicts Open the Activision
Add the Prototype 2 save folder (located in your Documents directory) to the exclusion list. 4. Fix Save Folder Permissions
If the quick fixes failed, your issue is likely permission-based or related to Windows security virtualization. One of the most disruptive issues is the
Windows Defender features a security tool called Controlled Folder Access that blocks unauthorized applications from modifying files in your user folders.
Prototype 2 was designed for Windows 7/8, not Windows 10/11.
This isn't a Prototype 2 problem; it’s a . We, the players, are now the archivists. We have to manually adjust the security of our own machines to allow a classic to keep running.