Amazon.com: SanDisk Micro SDXC Ultra Class 10 UHS-1 512GB Memory Card Works with Nintendo Switch OLED Model Gaming System (SDSQUA4-512G-GN6MN) Bundle with (1) Everything But Stromboli SD & MicroSD Card Reader :
Nintendo Switch™Micro SD Memory Card, MicroSDX (62 GB - 512 GB) | Western Digital