As you will see, it doesn't matter whether that delivery is on disk, by email or through a shared folder on the building network. The file index.htm is the opening page of the site, but it may not be the same for every site. Check with the service provider for their requirements. You will need to make sure all of your helpers understand this along with any other naming rules. A page is indicated by .htm and .gif or .jpg denotes a graphic image.
All folders have just the name and no extender.
Do not use any capital letters. Most servers these days allow more than eight characters and more than three characters in the extender. A good rule is to limit file names to fifteen character. But even if your service provider allows the use of longer file names, plan for a time when you may have to move the site to another host. Graphics need organization, too As you are probably aware, all images used in web pages must be in the JPEG or GIF format.