If you cannot change or save settings, your GameUserSettings.ini file may be set to Read-only . Right-click the file in %localappdata%\FortniteGame\Saved\Config\WindowsClient\ and uncheck "Read-only" in Properties .
Set Meshes to Low to give your builds the "mobile-style" look, which significantly reduces input lag and improves visibility. How To Fix Performance Mode in Fortnite! *BOOST...
The most effective way to stabilize performance is by enabling . If you cannot change or save settings, your GameUserSettings
Navigate to Settings > Video > Rendering Mode and select Performance . You must restart Fortnite for this change to take effect. The most effective way to stabilize performance is
Set Shadows, Global Illumination, and Nanite to Off . Set Textures, Effects, and Post-Processing to Low . Windows & System Fixes
Turn Game Mode to On to prioritize game resources, but turn Xbox Game Bar to Off to save RAM and reduce latency.
Use your monitor's native resolution in Fullscreen mode (not Windowed Fullscreen) to reduce input delay. If FPS is still low, drop the 3D Resolution slider to 75% or use an upscaler like TSR (Temporal Super Resolution) on "Low".