Dependendo da maneira como você conecta o dispositivo, aqui estão algumas exceções:
Com fio
Select to set the Network Setting. Before use the Network functions, please check following items: 1) Connect the Player to Network first;
2) Please enable NetBIOS of TCP/IP on computer;
3) Please turn off your PC's firewall;
4) Please enable your PC's "Guest" account;
5) Please share the folders which you wish to browse on your PC,
and make sure that "Everyone" or "Guest" has the right to access.
Também pelo que li no manual, parece que você deveria navegar do seu mediaplayer para o seu pc.
7.5.1 Browsing through Workgroup You can choose the workgroup which your PC belongs to from the workgroup list, find your PC name, and press to confirm.
Note: 1. While browsing high definition video files (resolution up to 720p / 1080i) via Ethernet or WLAN, the video might be buffering. It is normal due to the limit of network speed or signal strength. 2. Due to different network conditions, sometimes the workgroup might not be accessed or shown in the list. And then you need to use "My_Shortcuts" to browse shared files.
Eu encontrei o manual aqui