SanDisk 400GB SDXC Micro Ultra Memory Card Works with Samsung Galaxy S10, S10+, S10e Phone Class 10 (SDSQUAR-400G-GN6MN) Bundle with (1) Everything But Stromboli 3.0 Card Reader : Electronics - Amazon.com
Here are the best microSD cards for the Samsung Galaxy S9 & S9+
Amazon.com: SanDisk Ultra 400GB SDXC Micro Class 10 Works with RED Hydrogen One UHS-I Class 10 Bundle with Everything But Stromboli Card Reader : Electronics
Samsung Galaxy S9 and S9+ Smartphones: Super Slow-Mo Video, Low Light Camera, AR Emoji, IP68 Water & Dust Resistance, Expandable Memory of Up to 400GB with a Micro SD Card, Smartphone Protection
samsung s9... max size of micro sd card is 400 go? - Samsung Members
Amazon.com: SanDisk 400GB Extreme microSDXC UHS-I Memory Card with Adapter - Up to 160MB/s, C10, U3, V30, 4K, A2, Micro SD - SDSQXA1-400G-GN6MA : Electronics
Amazon.com: SanDisk 400GB Extreme microSDXC UHS-I Memory Card with Adapter - Up to 160MB/s, C10, U3, V30, 4K, A2, Micro SD - SDSQXA1-400G-GN6MA : Electronics
400GB Storage Capacity Cell Phone Memory Cards for sale | eBay
400 GB Memory Cards
Samsung Galaxy S9 and S9+ support 400 GB microSD cards - SamMobile
SanDisk 400GB microSDXC UHS-I Memory Card for Nintendo Switch SDSQXAO-400G-ANCZN - Best Buy
Amazon.com: SanDisk Ultra 400GB MicroSD XC Class 10 A1 UHS-1 Mobile Memory Card up to 100MB/s Read Speed (SDSQUAR-400G-GN6MN) with Mini MemoryMarket MicroSD Memory Card Reader : Electronics