I already saw an example about Simple FTP Server for SPIFFS. I try to upload the sketch to my ESP8266-12E and try to send the file to ESP8266 by FTP. It is work! The sketch is very good.
viewtopic.php?f=29&t=7655
I know the file is stored in SPIFFS of ESP8266. However, I want to store the file in SD card. So, my question is that Is it possible to transfer the file from SPIFFS to SD card? I already search in google, but I still can't find the solution. Can anyone help me? Many thanks!