diff --git a/src/config/gIndex.config.ts b/src/config/gIndex.config.ts
index 860fafb..1a298ef 100644
--- a/src/config/gIndex.config.ts
+++ b/src/config/gIndex.config.ts
@@ -108,6 +108,21 @@ const config: z.input<typeof Schema_Config> = {
      */
     proxyThumbnail: true,
 
+    /**
+     * Only show preview for files that are smaller than this size
+     * If the file is larger than this size, it will show "can't preview" message instead
+     *
+     * Why?
+     * Since the stream endpoint are counted as a bandwidth usage
+     * I want to limit the preview to only small files
+     * It also to prevent abuse from the user
+     *
+     * You can also set this to 0 to disable the limit
+     *
+     * Default: 100MB
+     */
+    streamMaxSize: 100 * 1024 * 1024,
+
     /**
      * Special file name that will be used for certain purposes
      * These files will be ignored when searching for files