This allows you to FTP into your esp8266 and access/modify the spiffs folder/data...it only allows one ftp connection at a time....very simple for now...
I've tested it with Filezilla, and the basics work (update/download/rename/delete). There's no create/modify directory support(no directory support in SPIFFS yet).
You need to setup Filezilla(or other client) to only allow 1 connection..
To force FileZilla to use the primary connection for data transfers:
Go to File/Site Manager then select you site.
In Transfer Settings, check "Limit number of simultaneous connections" and set the maximum to 1
feel free to try it out (sample provided)... https://github.com/nailbuster/esp8266FTPServer
this is the original project on github I worked from: https://github.com/gallegojm/Arduino-Ft ... /FtpServer