To upload and download files from the hosting company's web folders to one's own PC (vice versa)
FileZilla is a name of the Free FTP software. Download FileZilla client, not FileZilla Server from:
When you start FileZilla, there are four horizontally long windws to which you provide thee following information
Host: <this depends on a hosting company, but it may look like bbbb.dreamhost.com>
User: <you have to create an FTP user>
Password: [FTP password]
Before all this, you need to create an FTP user account on the hosting company's website by logging into your account. To make FTP a secured FTP connection, you need to choose SFTP. If just FTP, all information you submit through the FTP connection are leaking into the world of web.