One tool you’ll need to manage your WordPress files is an FTP program, such as Filezilla. Through FTP, you’ll upload themes and plugins to your blog. If your web host doesn’t provide any auto-installers, you’ll need an FTP program to install your blog.
Filezilla is a simple program. All it requires is your web address, username, and password to connect to your web host. When you connect, the remote host’s files appear in the right column, while your local files appear in the left column. You transfer files or folder from your local host to the remote host by dragging the files to the remote host column. After you enter your FTP details once, use drop-down arrow next to the Quick Connect button to connect immediately.