Prototype 2 Failed To: Save Data Fix

How to Fix Prototype 2 "Failed to Save Data" on Windows 10/11

If you're seeing the "Failed to save data" message in Prototype 2, you're likely dealing with a permissions conflict or a core-affinity issue common to older PC ports running on modern hardware. This error can prevent you from starting a new game or progress from being recorded. 1. Run as Administrator

The most common cause is that the game lacks the necessary permissions to write to your Documents folder.

Locate the Executable: In your Steam Library, right-click Prototype 2 > Manage > Browse local files.

Set Permissions: Right-click prototype2.exe, select Properties, and go to the Compatibility tab. prototype 2 failed to save data fix

Apply Changes: Check the box for "Run this program as an administrator" and click Apply. 2. Configure Controlled Folder Access

Windows Security sometimes blocks Prototype 2 from accessing your storage as a ransomware protection measure.

Open Security Settings: Search for "Controlled folder access" in the Windows Start menu.

Allow the App: Click "Allow an app through Controlled folder access" > Add an allowed app > Browse all apps. How to Fix Prototype 2 "Failed to Save

Select Game: Navigate to your installation folder and select prototype2.exe to whitelist it. 3. Clear Old Save Conflicts

If you have leftover files from a previous installation or Prototype 1, they may cause a "failure accessing storage device" error.

Navigate to Saves: Go to %UserProfile%\Documents\Activision\Prototype 2.

Backup and Delete: Move any existing files to a backup folder on your desktop, then delete them from the original folder to let the game create a clean save. 4. Limit CPU Core Affinity User Experience: Users who played Prototype 2 prior

Prototype 2 often fails or crashes on modern CPUs with high core counts (typically more than 4 or 8 cores). Failed to save data message preventing play

It sounds like you're encountering a common issue in Prototype 2 where the game fails to save your progress (e.g., “Failed to save data” or “Save failed”). Here’s a structured fix guide:

3. Advanced Fixes (If the Problem Persists)

6. Impact Assessment

  • User Experience: Users who played Prototype 2 prior to this fix have lost progress. Unfortunately, the data was never successfully written to the disk, making recovery impossible.
  • Schedule: The investigation and fix took approximately 6 engineering hours, causing a minor slip in the Prototype 3 milestone schedule (delayed by 1 day).

Fix #2: Whitelist Prototype 2 in Windows Defender

Windows Defender’s “Controlled Folder Access” is a common silent killer of old games.

  1. Open Windows Security.
  2. Go to Virus & threat protection > Ransomware protection.
  3. Click Manage Controlled folder access.
  4. Toggle Controlled folder access to Off (for testing). If this fixes the save issue, toggle it back On, but add an exception:
  5. Click Allow an app through Controlled folder access > Add an allowed app > Recently blocked apps (select Prototype2.exe). If not listed, browse to your Steam steamapps\common\Prototype 2 folder and add the .exe manually.