Steam Deck 64GB model, hardware upgrade, expanded storage, microSD card, high-speed SSD, portable gaming, ergonomic grip, action buttons, haptic feedback, HD touchscreen display, custom skin, durable case, thermal management, efficient cooling system, USB-C connectivity, gaming on-the-go, ambient lighting, 3D audio, clear sound, vibrant colors, anti-glare screen, intuitive controls, Valve software, SteamOS, seamless gameplay, full-frame camera angle, dynamic shadows, realistic textures, high fidelity graphics.