Windows Security sometimes blocks Prototype 2 from accessing your storage as a ransomware protection measure.
The most common cause is that the game lacks the necessary permissions to write to your Documents folder.
: Go to %UserProfile%\Documents\Activision\Prototype 2 . prototype 2 failed to save data fix
If you have leftover files from a previous installation or Prototype 1 , they may cause a "failure accessing storage device" error.
How to Fix Prototype 2 "Failed to Save Data" on Windows 10/11 Windows Security sometimes blocks Prototype 2 from accessing
: 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
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 If you have leftover files from a previous
: Check the box for "Run this program as an administrator" and click Apply . 2. Configure Controlled Folder Access