If the PC did not detect the SD card, you would need to fix it carefully so that you will not lose data.

So, if you insert it in another PC and you have access to the stored data on the card, then it means the SD card is in a working condition. If the 3ds sd card seems to have disappeared from the PC, the first thing to do is determine whether it has a problem or it's the PC that has issues. However, you do not need an expert to fix these issues for you as there are various steps that you can take to get the SD back to work. Whether you are using a PC or laptop, you will likely face these challenges. It could be that it is physically or logically damaged. You are probably wondering why your 3ds won't turn on. Part 2: Quick Fix: 3DS Could Not Detect an SD Card The 'drive letter' of your SD card might be missing.If not this, then there should be a corrupted or unrecognized file system. There can be poor contact between the SD card and your device.Part 1: Why is My SD Card Not Showing Up? Part 3: How to Avoid 3DS Could Not Detect an SD Card?.Part 2: Quick Fix: 3DS Could Not Detect an SD Card.Part 1: Why Is My SD Card Not Showing Up?.Then restart your computer and you can reuse an already clean USB flash drive. The time spent on formatting a 128gb SD card for 3DS is usually small. Then click on the Format Drive text and wait for the following recommendations from the Format Wizard. Go to Disk Management and select the desired disk with the right mouse button. The way is doing 3DS SD card formatting is the same as in the previous methods. As you noticed, this Nintendo 3DS SD card formatting method is also not at all complicated. Wait for the formatting to complete and restart the computer. The command line (Win + R) does a great job of formatting, and you only need to type a few commands on the keyboard and confirm them with the Enter key.

How to format sd card for 3ds