I'm sorry but I've no idea. I'm no developper, only a user and translator, but I cannot imagine this is a BS.Player-problem. I'd rather say it's a Windows-problem. Any special (access)rights/privileges or restrictions applicable for the new HD? All other programs have no difficulty in loading files from the new (sata)HD? When trying to load a moviefile from BS.Player's main=control-window you can see and select the files but they simply don't load? Irrespective of type (file-extension) of video-file?