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
16/32/64/128/256]GB Micro SD Card Memory For SAMSUNG GALAXY S9+ Mobile Phone | eBay
Amazon.com: Sandisk 32GB Extreme Pro 4K Memory Card works with Samsung Galaxy S9, S9+, S8, S8 Plus, Note 8, S7, S7 Edge - UHS-1 V30 Micro (SDSQXCG-032G-GN6MA) with Everything But Stromboli (TM)
OEM Red Sim Card + Micro SD Holder Slot Tray For Samsung Galaxy S9 Plus S9+ | eBay
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 Save Photos To Micro SD Card On Galaxy S9 And Galaxy S9 Plus - Tech Junkie
How to use micro SD card on Galaxy S9 and S9+? - Galaxy S9 Guides
Amazon.com: SanDisk 128GB Ultra Micro SD SDXC UHS-I Class 10 Works with Samsung Galaxy S9 Memory Card S9+, S9 Plus (SDSQUAB-128G-GN6MN) Bundle with (1) Everything But Stromboli MicroSDXC & SD Card Reader :
Galaxy S9/S9+: How do I install the memory card ? | Samsung Gulf
256GB Micro SD Card Memory For SAMSUNG GALAXY S9,S9+,S8,S8+,S8,S7 Active Mobile | eBay
64GB Micro SDXC Azaire U3 Memory Card for Samsung Galaxy S10 S10e S10+ Plus S9 | eBay
Here are the best microSD cards for the Samsung Galaxy S9 & S9+