If SD or MMC Memory Card Reader, Drive or Slot is not working or recognized, not detected or cannot be read in Windows 11/10, see this post.

Follow the onscreen prompts to install the driver for the card reader into Windows and restart the system of prompted. Insert the SD card adapter into the SD card slot on the card reader.

If your computer doesn't have a slot for a specific media card, you can use a digital media card reader to provide expanded compatibility.

Download Steam Deck SD Card Reader Drivers. Driver update in System Updates. OS support: Windows 10/11 ...