You have to allow your shield TV to access the network storage drive. To do that, you only have to perform six simple steps. First, open settings and select storage and reset. Then, select network storage and then your drive. Once you have clicked on the right drive, connect as a registered user and enter your username and password for the attached drive. Here, you can also enter as a guest, but any restrictions imposed on the guest profile will follow the shield. Although the steps are simple enough, you can watch video tutorials easily available online if you are stuck.