Prototype 2 Failed To Save - Data Fix Exclusive [upd]

Launch the game, start a new campaign, and attempt to save manually to test if the game successfully writes data to this newly created directory. Method 4: Clean Up the OneDrive Sync Conflict

Losing your campaign progress in Prototype 2 due to a saving error can be incredibly frustrating. This issue typically stems from modern Windows security features, administrative permission conflicts, or corrupted configuration files. Follow this definitive, step-by-step troubleshooting guide to permanently fix the "failed to save data" error and secure your game saves. Run as Administrator

If on Steam, right-click the game > Properties > General > Toggle Steam Cloud off then back on to reset the sync. prototype 2 failed to save data fix exclusive

Unlike the first game’s Alex Mercer, this bug doesn't wear a hoodie—it hides in Windows permissions. And the "Verify Integrity of Game Files" trick? That’s for amateurs. Here is the fix that actually works (and no, you don't need to disable your antivirus).

Locate prototype2.exe in your Steam folder ( steamapps/common/Prototype 2 ), right-click it, and choose Run as administrator . Summary of Solutions Description Success Rate CPU Affinity Limit game to 8 cores in Task Manager Disable HID Disable HID-compliant devices in Device Manager Admin Rights Run .exe as Administrator Delete Save Clear Documents/Prototype 2 folder Alternative Solutions Launch the game, start a new campaign, and

Close the game entirely and open your Windows .

Conflicting cloud data can overwrite local fixes and reintroduce corrupted files upon game launch. Open your Steam . Right-click Prototype 2 and click Properties . In the General tab, find the Steam Cloud section. Toggle the switch to Off to prevent automatic syncing. To help narrow down the exact cause, please let me know: Are you playing on Steam , Epic Games , or a physical disc ? Which Windows version (10 or 11) is your system running? And the "Verify Integrity of Game Files" trick

Right-click prototype2.exe in your Steam library files and select .

Do you use any software besides Windows Defender?