no, that's not enough. I need a preview just big enough for my 10" tablet screen. In that case, I only need to download a file from about 200Kb from my nas instead of more than 1OMb.
If 'jae_63' is right I believe there is no app on the market like that :-(
Strange nobody is dealing a similar problem, I believe a nas is the future of home entertainment. All my picutres, music and movies are stored on it. One of the reasons I bought a tablet was to watch my pictures on the nas. Problem is that it takes way to long to view the pictures..