Right-click the OneDrive cloud icon in your Windows taskbar tray and click Pause syncing .
Add the Prototype 2 save folder (located in your Documents directory) to the exclusion list. 4. Fix Save Folder Permissions
Before diving into the fixes, it helps to understand why this error happens. Prototype 2 was released in 2012, designed primarily for Windows 7. Modern operating systems like Windows 10 and Windows 11 feature drastically tightened security protocols. The error almost always stems from one of three issues: prototype 2 failed to save data fix
Prototype 2 needs VC++ 2008/2010 x86. Download from Microsoft or run _CommonRedist folder in game directory.
OneDrive often hijacks the Documents folder where Prototype 2 tries to create its save data ( Documents/Activision/Prototype 2 ). Right-click the OneDrive cloud icon in your Windows
The error is a notorious issue on modern Windows PCs, often caused by permission conflicts, OneDrive interference, or the game's struggle with high-core-count CPUs. 1. Configure "Controlled Folder Access"
To fix the "failed to save data" error in Prototype 2 , you generally need to Fix Save Folder Permissions Before diving into the
Let the community know in the comments below. For more Prototype 2 troubleshooting, check out our guides on fixing the "Infinite Loading Screen" and "Black Box crashes."
Right-click the on your desktop (or the prototype2.exe file in your installation directory). Select Properties . Navigate to the Compatibility tab. Check the box next to Run this program as an administrator . Click Apply and then OK . Launch the game and attempt to save. 2. Configure Windows Controlled Folder Access
Windows Defender includes a ransomware protection feature called "Controlled Folder Access." While excellent for security, it frequently blocks older games from writing save files to your Documents or AppData folders.