microSDXC™ Card for Nintendo Switch - 256GB - Nintendo Official Site
SanDisk 400GB microSDXC UHS-I Memory Card for Nintendo Switch SDSQXAO-400G-ANCZN - Best Buy
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Amazon.com: SanDisk 2 Pack Micro SD 256GB Nintendo Switch Memory Card Cards for Nintendo Switch Lite, Switch OLED and Switch (SDSQXAO-256G-GNCZN) Bundle with (1) Everything But Stromboli MicroSD Card Reader : Video