This is weird, because mine is double your bitrate (I set to the highest bitrate, which is the default I think). This is a 3-minute file of the front cam (the rear cam has similar bitrate) while driving (motion sensing off, parking mode off, WDR off). Of note is that the 3-minute file is 370MB which is about 6 times your file size. Did you happen to enable motion sensing or the parking mode while recording that may affect your bitrate?Alright did another test. This time did a loop around the neighborhood. Starting and ending in my driveway. Same loop both times. Was a hair under two minutes (loop set to 1 minute).