diff --git a/Filer-Server-API.md b/Filer-Server-API.md
index fc81ddd..8cbf220 100644
--- a/Filer-Server-API.md
+++ b/Filer-Server-API.md
@@ -32,6 +32,7 @@ You can append to any HTTP API with &pretty=y to see a formatted json output.
 | collection | collection | empty |
 | replication | replication | empty |
 | fsync | if "true", the file content write will incur an fsync operation (though the file metadata will still be separate) | false |
+| saveInside | if "true", the file content will write to metadata| false |
 | ttl | time to live, examples, 3m: 3 minutes, 4h: 4 hours, 5d: 5 days, 6w: 6 weeks, 7M: 7 months, 8y: 8 years | empty |
 | maxMB | max chunk size | empty |
 | mode | file mode | 0660 |