A Micro Express SD Card is a next-generation memory card format designed for high-speed data transfer and increased storage capacity. Primarily used in advanced consumer electronics like the Nintendo Switch 2, these cards offer faster read/write speeds compared to traditional microSD cards, making them suitable for demanding applications such as gaming, 4K video recording, and rapid file transfers. Due to their enhanced performance, Micro Express SD Cards are more expensive and are recommended for devices that specifically support the new standard. Their adoption improves user experience by reducing load times and enabling smoother operation of large applications or games.