Samsung Galaxy A40: How to insert the microSD card. Installation of the micro SD, also for A20e - YouTube
Kingston 64GB SDXC Micro Canvas Select Memory Card and Adapter Works with Samsung Galaxy A50, A40, A30 Cell Phone (SDCS/64GB) Bundle with (1) Everything But Stromboli MicroSD and SD Card Reader
128GB Micro SD Memory Card for SAMSUNG GALAXY A10,A40,A50,A51,A70,A71 Mobile | eBay
SanDisk 32GB SDHC Micro Ultra Memory Card Works with Samsung Galaxy A50, A40, A30 Cell Phone Class 10 (SDSQUAR-032G-GN6MN) Bundle with (1) Everything But Stromboli MicroSD and SD Card Reader