diff --git a/docs/tutorial-extras/11-harddisk.md b/docs/tutorial-extras/11-harddisk.md
index 7475747..cced7f4 100644
--- a/docs/tutorial-extras/11-harddisk.md
+++ b/docs/tutorial-extras/11-harddisk.md
@@ -28,6 +28,8 @@ nasupdate
 注意：TF 卡容量超过 128G 的，几乎是智商产品；  
 注意：不建议使用超过 500G 的硬盘。  
 
+![](./img/harddisk.jpg) 
+
 
 ## 3.执行安装命令
 
diff --git a/docs/tutorial-extras/img/harddisk.jpg b/docs/tutorial-extras/img/harddisk.jpg
new file mode 100644
index 0000000..58de890
Binary files /dev/null and b/docs/tutorial-extras/img/harddisk.jpg differ