FTP (File Transfer Protocol) is best implemented by using a FTP PROGRAM which you install on your hard drive. A good free FTP program is Filezilla.

Download this from the web (not sure where it's found, but google it) and install it on your computer.

Once up an running, you will be able to transfer material from your hard drive to your server much more efficiently than through c-panel.

(Your host will have told you the FTP address and login details for your site - probably in their Welcome Email. If you don't have this info, just contact your host and ask for the FTP address and login for your server/domain.)