Idiotically, I forgot to say that I was running Mageia Linux 2 and on an Asus M4A785TD-V EVO motherboard. I know nothing about Asus' DLNA Media server is that a compatible application?
To be a (a bit more) specific. If I plug in the Galaxy S3 by its USB lead, the system sees it but cannot get to the underlying directories and files. As I understand it the kernel that I am using doesn't support the file system used by Android which is designed for solid state storage as opposed to hard drives. My question should really have been, has an appropriate module yet been introduced into the kernel.