Amazon.com: SanDisk 256GB Ultra Micro SD SDXC UHS-I Class 10 works with Samsung Galaxy S9 Memory Card S9+ Plus (SDSQUAR-256G-GN6MN)Bundle with (1) Everything But Stromboli Card Reader : Electronics
Galaxy S9 Single Sim 64GB | Samsung Support UK
Amazon.com: SanDisk 128GB Ultra Micro SD SDXC UHS-I Class 10 works with Samsung Galaxy S9 Memory Card S9+, S9 Plus (SDSQUAR-128G-GN6MN) with Everything But Stromboli (TM) Card Reader (Class 10 128GB) :
How to format memory card on Galaxy S9/S9+? | Samsung Malaysia