Galaxy S9 Plus - Dual SIM & SD Card Work Simultaneously on Samsung Galaxy S9 Plus Duos - YouTube
Galaxy S9: How To Eject SIM Card/SD Slot w/ Video
You can buy the Galaxy S9 with 256GB of storage soon, but you probably shouldn't
Amazon.com: Samsung Galaxy S9 Memory Card SanDisk 64GB Ultra Micro SD SDXC UHS-I Class 10 works with S9+, S9 Plus (SDSQUAR-064G-GN6MN) with Everything But Stromboli (TM) Card Reader (64GB) : Electronics
Amazon.com: One Single SIM Micro SD Card Tray Holder Slot Replacement w/Eject Pin for Samsung Galaxy S9 Plus SM-G965U : Cell Phones & Accessories
Amazon.com: SD Card Reader USB C, Unitek 3 in 1 Type C to USB Camera SD/Micro SD Memory Card Reader Adapter 2TB Capacity for MacBook Pro/Air, iPad Pro, XPS, Samsung Galaxy S10/S9/S8
How to use micro SD card on Galaxy S9 and S9+? - Galaxy S9 Guides
Galaxy S9: Eject SIM/SD Card Tray
How to Install Galaxy S9 SIM Card & Memory Card - YouTube