Problem in downloading dataflash logs

Hi All,
I am not able to download data flash logs from my Pikshawk, so I downloaded .BIN files directly from the SDcard, now when I try to analyse the logs I downloded manually from SD card, I don’t see any IMU, Position, Altitude e.t.c recorded, Also the telemetry logs I record are at very low frequency although the settings of telemetry rates on mission planner are set to maximum. My firmware is Rover 3.1.0.

Thanks In advance