I am new to the D-Link IP camera system and want to setup my DCS-942L in such a way that it records on a harddisk drive only the events triggered by motion detection. This function works fine with a micro SD card installed. But I don't want to use the card. I want to record every movement on a harddisk 24/7 and, at the same time, save some harddisk space by the use of motion detection. I don't know how to set it up as it currently continuously records everything round the clock (with or without motion) Is what I try to do an available feature or does it only work with an installed SD card?