I've found no way to configure. It's gotta be the biggest draw back for me with using this as a media server. I have a cisco nmh410 aswell, and that basically automatically tracks files as they are added. So once the index is built it takes only a second for new files to be added. I've got at least a week without this one adding a single file. Only thing it seems one can do is refresh the whole thing manually, which if you have 2 x 2tb drives full of data, takes ages....