diff --git a/RTL/sd_file_reader.v b/RTL/sd_file_reader.v
index 5483ba0..1664010 100644
--- a/RTL/sd_file_reader.v
+++ b/RTL/sd_file_reader.v
@@ -10,10 +10,9 @@
 //--------------------------------------------------------------------------------------------------------
 
 module sd_file_reader #(
-    parameter            FILE_NAME_LEN = 11           ,  // valid length of FILE_NAME (in bytes)
-    parameter [52*8-1:0] FILE_NAME     = "example.txt",  // file to read, ignore Upper and Lower Case
-                                                         // For example, if you want to read a file named HeLLo123.txt in the SD card,
-                                                         // this parameter can be hello123.TXT, HELLO123.txt or HEllo123.Txt
+    parameter            FILE_NAME_LEN = 11           ,  // length of FILE_NAME (in bytes). Since the length of "example.txt" is 11, so here is 11.
+    parameter [52*8-1:0] FILE_NAME     = "example.txt",  // file name to read, ignore Upper and Lower Case
+                                                         // For example, if you want to read a file named "HeLLo123.txt", this parameter can be "hello123.TXT", "HELLO123.txt" or "HEllo123.Txt"
     parameter [2:0] CLK_DIV = 3'd2,     // when clk =   0~ 25MHz , set CLK_DIV = 3'd1,
                                         // when clk =  25~ 50MHz , set CLK_DIV = 3'd2,
                                         // when clk =  50~100MHz , set CLK_DIV = 3'd3,