Dragonfly 7" to Windows 10

I am trying to get the marks from the GPS to our windows 10 machine.
1) I have loaded GPS Babel, although I am not sure what input file to use but I have d/loaded all the data to the SD Card.

2) So I have 2 main files, Garmin & Navionics as well as a couple of fsh files and some bmp dump files that are pictures saved from the Sonar. Can't find any waypoint files in format GPS Babel recognises though?

3) I have tried inserting a blank sd card as per the manual ​but the GPS doesn't recognise it once it is in. What format should I make it? FAT32 or NTFS?

Any help would be greatly appreciated.

Paul.