How to use micro SD card on Galaxy S9 and S9+? - Galaxy S9 Guides
Galaxy S9: How to Move Apps to the MicroSD Card - YouTube
Easy steps on how to insert or remove SD card for Galaxy S9 – The Droid Guy
Amazon.com: LENTION USB C to SD/Micro SD Card Reader, Type C SD 3.0 Card Adapter Compatible 2021-2016 MacBook Pro 13/15/16, New Mac Air/iPad Pro/Surface, Samsung S20/S10/S9/S8/Plus/Note, More (CB-C8, Space Gray) : Electronics