The Best Micro SD Cards for Your Galaxy S9 « Android :: Gadget Hacks
Amazon.com: SanDisk 128GB Micro Extreme Memory Card works with Samsung Galaxy S9, S9 Plus, S8, S8+, S7, S7 Edge Cell Phones 4K Recording UHS-I (SDSQXAF-128G-GN6MA) with Everything But Stromboli (TM) Card Reader :
Samsung Galaxy S9 Tips - How to Save Images to a MicroSD Card - YouTube
Amazon.com: Samsung Pro Plus 256GB MicroSD Class 10 UHS-I Memory Card for Samsung Galaxy S20 FE 5G, S20 Ultra, S20, S20+, S10, S9 Phone - MB-MD256KA Bundle with Everything But Stromboli Micro
How to Install Galaxy S9 SIM Card & Memory Card - YouTube