GIGA Wifi, web server and HTML files read on USB drive

Hello,
I want to create a Web server that reads HTML files (with Java script and CSS) stored on a USB key connected to the Arduino Giga. When a client (browser on a smart phone for example) is connected via WiFi, web pages are sent to the client and the user can interact with them and return actions, values, etc. There are many examples with the ESP 8266 but I can't find any on GIGA WIFI, does anyone have an idea? THANKS .