Prototype 2 Failed To Save Data Fix [better] -

. Below is an informative report outlining the primary causes and proven fixes. Primary Cause: Windows Controlled Folder Access

If you bought Prototype 2 on rather than Steam, you have a unique problem. The GOG version is notoriously DRM-free, but its cloud sync implementation is fragile. If you see the “failed to save” error on GOG: prototype 2 failed to save data fix