All NanoCamPlus In-Car HD Digital Video Recorders feature Loop Recording. Loop Recording means the camera will automatically delete the oldest dated files to make room for new recordings i.e. the camera may be deleting recorded files from Saturday when you’re driving on Sunday. Essentially, there is no need to empty the SD card when it becomes full. The user can continue to use the camera long term without the unit needing constant attention. The purpose of Loop Recording is that only the most imperative footage is saved for future reference rather than recording non-stop where all the footage recorded may not necessarily be relevant.  Video recording is highly memory intensive so Loop Recording is typically used as a method for making the most use of the limited memory space in an In-Car DVR.