Amazon.com: Samsung 256GB Micro SDXC EVO Plus Memory Card with Adapter Works with Samsung Galaxy S7, Tab S7+ Tablet, A21s Smartphone (MB-MC256KA) Bundle with (1) Everything But Stromboli SD, TF Card Reader :
Amazon.com: MMOBIEL Dual SIM Card Slot Tray Holder Replacement Compatible with Samsung Galaxy A21s 2020 - Incl. Rubber Gasket and Sim Pin - Black : Cell Phones & Accessories
Samsung Launches Galaxy A21s in India, the Most Affordable 2020 Galaxy A with 48MP Quad Camera – Samsung Newsroom India
Samsung A21S how to put Sim card and SD card - YouTube