SanDisk 400GB microSDXC UHS-I Memory Card for Nintendo Switch SDSQXAO-400G-ANCZN - Best Buy
Choosing a microSD Card for Your Nintendo Switch - Kingston Technology
Amazon.com: SanDisk Nintendo Switch MicroSD 256GB Memory Card (2 Pack) for Nintendo Switch OLED Model (SDSQXAO-256G-GNCZN) U3, Class 10, 4K UHD Bundle with (1) Everything But Stromboli MicroSDXC & SD Card Reader :
Are Nintendo-License SD cards the only sd cards that can be used for Switch? : r/Switch