<?
// Path to the project's root folder
echo base_path();

// Path to the 'app' folder
echo app_path();

// Path to the 'public' folder
echo public_path();

//Path to the 'app/storage' folder
echo storage_path();
?>

$path = base_path().'/public';
return File::put($path , $data)

$myPublicFolder = public_path();
$savePath = $mypublicPath."enter_path_to_save";
$path = $savePath."filename.ext";
return File::put($path , $data);