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 Could Sport 512GB of Internal Memory as Samsung Announces First-Ever UFS Storage for Next-Gen Phones