So, im trying to write an audio file into arduinos Sd card (using arduino mega) I tried to get ftp server to work after 4 hours I gave up 
the hardware that I got right now are W5100 ethernet shield and esp8266-07 Wifi module I think I should be able to make one of them work somehow I just dont know how yet still trying to figure it out any suggestions or code example of how to make ftp server work? the example code that I got compiled and uploaded but I was never able to connect to the server even after filling up all the network data correctly.