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If the target folder properties are locked to a "Read-Only" state, the operating system will block the game engine from adding new save files. Go to your folder.
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Windows 10 and Windows 11 include a security feature called , designed to protect key directories from ransomware. However, it frequently flags older games like Prototype 2 as suspicious and blocks them from writing data to your Documents folder. prototype 2 failed to save data fix
Before you spend an hour editing registry keys, try this high-success-rate sequence.
The final path should look like this: Documents\Prototype 2\SaveData . Restart the game and check if it can save now. 4. Adjust OneDrive Settings
Locate the game executable ( prototype2.exe ) in your installation folder (usually under Steam\steamapps\common\Prototype 2 ). Right-click it and select > Compatibility . Check Run this program as an administrator . ; If the target folder properties are locked
Scroll down and click Manage ransomware protection . Toggle the feature: Switch Controlled folder access to Off .
Windows sometimes "virtualizes" saves for older games, placing them in a hidden AppData folder instead of your actual Documents. Here is how to force the correct behavior.
Other third-party antivirus programs (Avast, AVG, McAfee) might flag prototype2.exe and block it from writing to the disk. Open your antivirus software. Check the quarantine or blocked programs list. Add prototype2.exe to the . 6. Edit the Game Configuration (Advanced) However, it frequently flags older games like Prototype
Prototype 2 often fails to save data on modern Windows 10 and 11 systems because it cannot properly access the Documents folder due to modern security settings, administrative restrictions, or conflicts with high-core-count processors. 1. Grant Administrative Privileges
Sometimes the game installer fails to properly generate the directory tree required for saves. If the folders do not exist, the game engine cannot dynamically create them during gameplay.
Wait for Steam to scan and automatically redownload any missing or broken data.
Open your Steam library, right-click on , hover over Manage , and select Browse local files . Locate the main game executable file named prototype2.exe . Right-click prototype2.exe and select Properties . Navigate to the Compatibility tab.
If your computer automatically backs up the Documents folder to Microsoft OneDrive, the game may fail to recognize the file path. Prototype 2 expects a local path and struggles with virtualized cloud paths.