How is a file uploaded?
The most common method of uploading a file to another computer or server is by using FTP. When using an online service with no FTP support (e.g., social networking service like Facebook) a file is uploaded through the browser on the services website. Other methods of uploading a file include file sharing on a network, Telnet, SSH, and P2P.
Copying vs. uploading
Many new computer users inapproperiately refer to copying files as uploading. When you are copying a file from your computer to another drive or folder on the same computer you're copying that file and not uploading the file. If you are sending a file to a different computer from your computer, you are uploading the file.