diff --git a/New-or-Unknown-Features.md b/New-or-Unknown-Features.md
index e854491..f5abe4c 100644
--- a/New-or-Unknown-Features.md
+++ b/New-or-Unknown-Features.md
@@ -37,3 +37,10 @@ wiinnertag_url=https://tag.rc24.xyz/wii?game={ID6}&key={KEY}
 Note: it says gamercards and not gamertags. I don't know why.  
 Riitag simply uses the wiinertag name because it wasn't changed internally in wiiflow code. But that's ok, as long as the key and url are correct.  
 For more info and how to set it up go here - https://wii.guide/riitag
+
+***
+## SD_only
+
+In 2019 and beyond the storage capacity of SD cards has grown to 128gb or even 256gb. So some users have started using SD cards only since WiiFlow is capable of playing games from SD. But they noticed even without a USB HDD connected WiiFlow took a long time to boot up because it would still need to check for a USB HDD which also gave the device time to spin up. To bypass this the SD_only setting was added. On very first boot there will still be the long wait but then any boot after that it will boot much faster.
+
+If for any reason you need to change this setting go to main settings>startup settings.
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