Chosen Solution
Whenever I turn on my 3DS, a bit of text pops up saying “Could not detect an SD Card. The software on the SD Card could not be displayed.” It has been this way for a while now, but I still don’t know what to do. I took it to a computer repair shop and the guy said that it’s a problem with the motherboard.
In what file system is the SD card formatted? It may be a problem with the card itself. If the card is working, you may need to replace the card reader component. It’s not a big deal as you can see in this video :) https://www.youtube.com/watch?v=5Qrp-gqL…