Amazon.com: Nextorage Japan 256GB A2 V30 CL10 Micro SD Card for Nintendo Switch, Steam Deck, Smartphones, Gaming, Go Pro, 4K Video, microSDXC Memory Card UHS-I U3 up to 100MB/s, with Adapter (G-Series) :
microSDXC™ Card for Nintendo Switch - 128GB - Nintendo Official Site
EVO Select + Adapter microSDXC 256GB Memory & Storage - MB-ME256KA/AM | Samsung US
Kingston 256GB microSDXC Canvas Go Plus 170MB/s Read UHS-I Class 10 U3 V30 A2/A1 Memory Card + Adapter SDCG3/256GB - Walmart.com
SanDisk Ultra 256GB MicroSD XC Class 10 UHS-1 Mobile Memory Card for Go Pro Camera Hero 7 & 8 with USB 3.0 MemoryMarket Dual Slot MicroSD & SD Memory Card Reader - Walmart.com