diff --git a/Filer-Server-API.md b/Filer-Server-API.md
index bf47a45..aa2333e 100644
--- a/Filer-Server-API.md
+++ b/Filer-Server-API.md
@@ -37,7 +37,7 @@ You can append to any HTTP API with &pretty=y to see a formatted json output.
 
 ### notice
 * It is recommended to add retries when writing to Filer.
-* `AutoChunking not supported for method PUT` so If the file length is greater than 256MB, only the previous 256MB will be saved.
+* `AutoChunking` is not supported for method `PUT`. If the file length is greater than 256MB, only the leading 256MB in the `PUT` request will be saved.
 
 Examples:
 ```bash