Please use DaveBrad/DevFsUploadESP instead.
A Arduino library that provides a browser GUI to upload/delete file(s) to SPIFFS and webpage devices (eg. ESP8266)
This library provides a ESP8266 development tool to upload file(s) to an ESP8266 module that has SPIFFS included. The tool works through a webpage to:
Additional capabilities:
NOTE/WARNING: there is no checking for free space on the ESP8266 when uploading files.