FILE UPLOAD MAX SIZE WITH SERVER FOLDER

 WEB CONFIG   FILE 

<?xml version="1.0"?>

<configuration>

  <system.web>

    <httpRuntime maxRequestLength="1048576" executionTimeout="999999"/>

    <customErrors mode="Off"></customErrors>

    <compilation debug="true" targetFramework="4.0"/>

  </system.web>

</configuration>

Folder Code 

 protected void Button1_Click(object sender, EventArgs e)

    {

        //file upload 

        FileUpload1.SaveAs(Server.MapPath(@"~/nsadmin/") + "//news//" + FileUpload1.FileName);

        Label1.Text = "File upload successfully please click save button to save record";

    }