The forgotten WDN3-Part I

Hi. Please I need help to setup my WDN3, that I know it was retired from the market (don’t know why). I am NOT looking for a refund. I am just looking for help. Or maybe official documentation. My problem is very simple. The ssd disk that I insert into the bay is not recognized. This means, I can’t reproduce any videos. Even though the disk is correctly recognized when I connect the WDN3 to my PC. I include some photos. Thanks for your help.!