Open Steam, right-click Prototype 2 , hover over Manage , and select Browse local files .
Windows Defender and third-party antivirus programs often flag older games trying to write data to the Documents folder as a ransomware threat. Fix Controlled Folder Access
Windows Security features block unrecognized older programs from changing files inside your primary Documents folder.
The game looks for its save folder at %USERPROFILE%\Documents\Activision\Prototype 2 . If you use OneDrive, it may move this folder to a cloud path the game can't reach. prototype 2 failed to save data fix
The "Failed to save data" error in Prototype 2 on PC is a common issue caused by modern Windows security features, administrative permission conflicts, or CPU core count limitations. Method Action Justification Controlled Folder Access
Windows Defender blocks the game from writing files to your user profile directory.
Ultimate Guide to Fixing the "Prototype 2 Failed to Save Data" Error Open Steam, right-click Prototype 2 , hover over
OneDrive can sometimes lock the save folder ( Documents\Activision\Prototype 2 ). Try signing out or pausing OneDrive while playing.
: Go to %UserProfile%\Documents\Activision\Prototype 2 .
const saved = await res.json(); // persist locally as cache localStorage.setItem(`proto2:$saved.id`, JSON.stringify(saved)); return saved; catch (error) console.error('SaveProto2 error', error); // optional: enqueue for retry or show user-facing error throw error; The game looks for its save folder at
Here is the technical truth: Prototype 2 tries to write your save files to a folder structure that Windows no longer trusts. Specifically, it wants to write to your or AppData without the proper administrative clearance.
High core counts on modern CPUs (Ryzen/Intel) cause engine-level instability and save failures. Delete or move profile.bin from the save directory.
temporarily to see if it restores local access to your Documents folder.
Under the tab, look at the bottom Attributes section.
Locate the folder, right-click it, and pick Properties .
