diff --git a/pages/guide/drivers/feiji.md b/pages/guide/drivers/feiji.md
index 156128579..3b7c04d9b 100644
--- a/pages/guide/drivers/feiji.md
+++ b/pages/guide/drivers/feiji.md
@@ -58,9 +58,20 @@ Just fill in your own Feiji Cloud Account Password
 填写自己的小飞机网盘帐号密码
 :::
 
-### The default download method used { lang="en" }
+## Known issues { lang="en" }
 
-### 默认使用的下载方式 { lang="zh-CN" }
+## 已知问题 { lang="zh-CN" }
+
+::: en
+The file size returned by iLanZou is in Kilo Bytes, not Bytes. Therefore, you cannot accurately determine if a file has been modified based on its size. Please pay attention to the configuration of your sync software.
+:::
+::: zh-CN
+蓝奏云优享版返回的文件大小非 Bytes，而是 Kilo Bytes，因此无法使用文件大小准确判断一个文件是否被修改，需要注意同步软件的配置。
+:::
+
+## The default download method used { lang="en" }
+
+## 默认使用的下载方式 { lang="zh-CN" }
 
 ::: en
 
diff --git a/pages/guide/drivers/ilanzou.md b/pages/guide/drivers/ilanzou.md
index 9f4e7bce2..f746420e9 100644
--- a/pages/guide/drivers/ilanzou.md
+++ b/pages/guide/drivers/ilanzou.md
@@ -48,9 +48,20 @@ Just fill in your own NewLanzou Cloud Account Password
 填写自己的蓝奏云优享版帐号密码
 :::
 
-### The default download method used { lang="en" }
+## Known issues { lang="en" }
 
-### 默认使用的下载方式 { lang="zh-CN" }
+## 已知问题 { lang="zh-CN" }
+
+::: en
+The file size returned by iLanZou is in Kilo Bytes, not Bytes. Therefore, you cannot accurately determine if a file has been modified based on its size. Please pay attention to the configuration of your sync software.
+:::
+::: zh-CN
+蓝奏云优享版返回的文件大小非 Bytes，而是 Kilo Bytes，因此无法使用文件大小准确判断一个文件是否被修改，需要注意同步软件的配置。
+:::
+
+## The default download method used { lang="en" }
+
+## 默认使用的下载方式 { lang="zh-CN" }
 
 ::: en