16/32/64/128/256]GB Micro SD Card Memory For SAMSUNG GALAXY A21s Mobile Phone | eBay
Dual Sim & Micro SD Card Holder for Samsung A21s / A217 | Blue | BAQ
Samsung 256GB Micro SDXC EVO Plus Memory Card with Adapter Works with Samsung Galaxy S7, Tab S7+ Tablet, A21s Smartphone (MB-MC256HA) Bundle with (1) Everything But Stromboli SD, TF Card Reader :
How to Insert Sim cart| SD cart in Samsung Galaxy A21S |Memory card slots |MicroSD card| Nano SIM - YouTube