printer with sd card slot
Ender3 SD Slot Issue - YouTube
Problem with micro SD slot not reading the card. Card has to be held in for it to work. Bad SD slot on control board.
Type C Card Reader | eBay
Turn off the printer and insert the SD card into the card slot on the motherboard.
Best Android phones with SD card slot | Android Central
These adapters convert the micro SD card into a standard SD card size, allowing it to be inserted into devices with SD card slots.