Formatting your Fly6 Original SD card will result to the config.txt file to be deleted. You will need to download the file and save it to your SD card. 

To download, please follow these steps:

1. Hover your mouse to the image below, right click and choose "Save link as"
   
   

2. Save the file to your desired folder/location.

Note: Make sure the file name is exactly "config.txt" and not config (2).txt or otherwise.