Hi Dombo71,
you have to check if your Enigma2 box is provided with a DNLA Server. You can look at this (quite old)
thread.
Another option could be access the Enigma2 box storage using SMB protocol, in that case you need an SMB server on the box. Googling around I've seen that it should be feasable.
Hope this helps.
Ciao.
Simone.