troubleshooting: add sd init fail

_pages/en_US/troubleshooting.txt

@@ -34,6 +34,14 @@ Issues after installation:
 
 ### SigHaxed FIRM was not installed! Check lower screen for more info.
 
+{% capture compat %}
+<summary><u>MicroSD Card - init failed</u></summary>
+
+Your SD card is most likely acting weird. Try reformatting your SD card ([Windows](formatting-sd-(windows)), [macOS](formatting-sd-(mac)), [Linux](formatting-sd-(linux))). If this doesn't work, try another SD card.
+
+{% endcapture %}
+<details>{{ compat | markdownify }}</details>
+
 {% capture compat %}
 <summary><u>SigHaxed FIRM - File not found</u></summary>