Computer webserver (for OTA)

If you’re not familiar with the file structure if web hosting sites then you might spend a while scratching your head trying to get things working. It took me a while to figure out that you need to go to the /public_html folder and create your device specific folders there.
If your update file is called update.ino then it’s path should be something like:

In this situation your application external URL would be:

Also, watch out for the fact that these file names and URLs are case sensitive.