Don't use the SD feature of this camera. But I'll explain my setup, maybe you will find something useful.
I use the D-View camera software that comes with all these cameras and set up motion detection within the software. The interface isn't all that intuitive, but the playback system is pretty good. You go into playback mode, highlight the area of interest in time and hit play. This way you only get times where there are motion events and you don't have to go searching.
The big drawback with this software right now is that you need a windows machine running all the time for it. I tried out ZoneMinder software on ubuntu but found issues with camera processes crashing all the time.
Good luck