Amazon.com: SanDisk 256GB SDXC Micro Ultra Memory Card Works with Samsung Galaxy S10, S10+, S10e Phone Class 10 (SDSQUAR-256G-GN6MN) Bundle with (1) Everything But Stromboli Multi slot SD and Micro Card Reader :
For Samsung Galaxy S10 Lite SM-G770 SIM Card Tray + SIM Card Tray / Micro SD
How to Install SD and SIM Card into Samsung Galaxy S10 - YouTube