OEM SAMSUNG GALAXY A40 SM-A405FN/DS ORIGINAL BLUE MICRO SD SIM CARD TRAY HOLDER | eBay
Samsung Evo Plus 512GB Micro SDXC Memory Card Class 10 Works with Android Phones - Galaxy A51, A50, A40, A30 (MB-MC512) Bundle with (1) Everything But Stromboli MicroSD & SD Card Reader | Pricepulse
What to do if your SD card is not detected on your Galaxy device