You are trying to conect this disk to the standalone Sony bluray device with USB cable? You are sure sony have implemented this functions (external disk support) on this player?
Now knowing enough about the sony device, you should first of all see through the users manual. There could be a FAT(32) / NTFS issue. Some devices like this does not support NTFS, and the drive must be formated with FAT32.
Answers & Comments
You are trying to conect this disk to the standalone Sony bluray device with USB cable?
You are sure sony have implemented this functions (external disk support) on this player?
Now knowing enough about the sony device, you should first of all see through the users manual. There could be a FAT(32) / NTFS issue. Some devices like this does not support NTFS, and the drive must be formated with FAT32.