I Think there is a Bug with Laravel 5.4?

i'm trying to send a email with Attachment File , It Work Perfectly when i'm using an externale link like :

public function build() 
{ return $this->view('email.test') ->attach("http://ift.tt/2ljrDaY"); }

But when i try to send Files that stored on my Storage Folder like :

public function build() 
{ return $this->view('email.test') ->attach("http://ift.tt/2lF2Jyr"); }

, it Thrown an Eroor :

Swift_IoException in FileByteStream.php line 144: Unable to open file for reading

i had already generated a Storage:LINK , that allow to me to access to Storage Folder and i can access to it via url ( http://ift.tt/2ljrCnq ) ,

Please Help me What should i do ? it's been 3 days i'm trying to resolve this problem and nothing Found :/

via Chebli Mohamed