Can't believe that no one answered this.
If it is shared and the sharing supports cifs or samba then mount manager should pick it up via the wizard and add it. Once added you will be able to see it and play from it within Media Player.
Strictly speaking the VU+ UNO is yet another Dreambox clone. As such it also has to use patched Enigma2 images. That is why there are only a limited amount for it. Media Play is not fully working in any patched images yet. For example, FFWD, RWD does not work and not all formats run well on it. Time shift also has similar issues. These issues are found on other clones also (eg. Azbox) but NOT DM's or DM clones like 800 SE where all works like original DM.
As a clone of a clone, the VU looks nicer but I doubt it will ever be as good as the real thing or a real clone.