ADS-B Data Output

I am a newbie with this ADS-B Receiver System.
I already able to setup the ADS-B Receiver System and running it successfully up until this process:


However I can’t find the dump1090 map and the dump978 map in the Raspberry-Pi SD Card.
I also follow the steps from: https://github.com/openskynetwork/raspberry-pi-adsb

How can I save the data output live dump1090 map or data output live dump978 map into CSV file?