There a two basic times you will upload images:

1. Uploading to Display Images in your site - in a gallery
2. Uploading to fulfill an order for printing (or digital fulfillment)

Please note to NOT confuse the two!  Uploading to fulfill an order for printing is a separate and different process.

The basic ways of uploading image files for displaying photos on your site:

1. Web uploader
2. FTP (File transfer protocol)
3. Single files

The basic ways of uploading to fulfill orders placed:

1. Through your Administrative site - the "Required Files" screen
2. Via FTP (See Fulfilling orders via FTP)