Thanks for the reply.
The side effect I experience is constant hard drive activity once DLNA is enabled (even after the 1st few days of any initial scan)- despite trying the various settings etc on my QNAP NAS. This is not only noisy, but I suspect will reduce the life of the HDD due to constant HDD activity.
As mentioned above Samba support should be offered - it should be a no brainer and easy to implent.