This is an add-on section for formatting an SD card to work with the 3DS.
If the 3DS already recognizes the SD card, this guide is not required.
本教學僅適用於 Linux 使用者。 If you are not on Linux, check out the [Formatting SD (Windows)](formatting-sd-(Windows)) or [Formatting SD (Mac)](formatting-sd-(mac)) pages.
### 操作說明
#### Section I - Determining which slot your SD card is in
1. Make sure your SD card is **not** inserted
1. Launch the Linux Terminal
1. Type `watch "lsblk"`
1. Insert your SD card into your PC
1. Observe the output. It should match something like this:
```
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mmcblk0 179:0 0 3,8G 0 disk
└─mmcblk0p1 179:1 0 3,7G 0 part /run/media/user/FFFF-FFFF
```
1. Take note of the device mount point. In our example above, it was `mmcblk0`
+ If `RO` is set to 1, make sure the lock switch is not slid down