If your SD Card is not detected in Device Manager, it can be caused due to outdated drivers, hardware issues, etc. Use these fixes to resolve this issue.

It's quite easy to import photos from SD card to Windows Photo App and store them locally to your PC. Here's a step-by-step tutorial to help you out!

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

But while they support theoretical data transfer speeds up to 3,700 MB/s, real-world performance may vary depending on the card, reader, and other hardware.

Update March 14th, 9:42PM ET: Valve says it’s reproduced the bug I was seeing with SD cards vanishing in Windows, and has uploaded a new SD card reader driver that it hopes will fix the issue.

Add in a hacked USB card reader, some careful cutting and assembly, and [gilmour509] has a very convincing floppy drive with gigabytes of space.