Samsung Galaxy S9 / S9+: Find Your Device Total Storage Space (Total GB) - YouTube
Galaxy S9: How to use Expandable Storage - YouTube
Samsung Galaxy S9 - 4G smartphone - RAM 4 GB / Internal Memory 64 GB - microSD slot - OLED display - 5.8" - 2960 x 1440 pixels - rear camera 12 MP - front camera 8 MP - U.S. Cellular - lilac purple - Walmart.com
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