This is an example sketch that hosts the files in the SPI Flash File System, and let's you upload new files to the server as well. It's adapted from the FSBrowser example by Hristo Gochkov.
Go to /upload to upload new files.
Go to /contact contact files.
Go to / a.ino a.ino Programmfile.
Go to /testus testus.
Go to /Wintergarten Wintergartensteuerung