Connection fields explained
Host is the address of your server (for example ftp.yourdomain.com or an IP address). Port is 21 for FTP and FTPS with explicit TLS, 990 for implicit FTPS and 22 for SFTP. Username and password come from your hosting provider or server administrator. Remote path is optional and lets you open a specific folder, such as /public_html, immediately after connecting.
Choosing a protocol
Use SFTP whenever your server offers it: it runs over SSH on a single encrypted channel and needs no extra firewall rules. Use FTPS with explicit TLS when your server is FTP based but supports encryption. Use plain FTP only on trusted internal networks, because credentials and file contents travel unencrypted. SFTP is available in the desktop application and in the browser gateway when the hosting account provides the PHP SSH2 extension; FTP and FTPS remain available without SSH2.
Key-based authentication
In Site Manager set the authentication method to Key file and select your private key (OpenSSH or PuTTY format). If the key is protected by a passphrase, Ghost FTP asks for it when connecting and can keep it for the current session only. The public key must be present in ~/.ssh/authorized_keys on the server. Keys never leave your computer.
Transfer mode and passive connections
Leave transfer mode on Passive unless your administrator tells you otherwise; passive mode works behind most routers and firewalls. Set the transfer type to Automatic so text files get correct line endings and binaries stay untouched. Concurrent transfers default to two; raise them only if your server allows more sessions. Timeout defaults to 20 seconds and can be increased for slow links.
Saving a site
Open Site Manager, create a new entry, fill in host, port, protocol, username and authentication, then give it a clear name. Optionally set a default local folder and a default remote folder so both panes open where you work. Saved sites can be grouped into folders, duplicated for separate environments, and exported for backup.
Server side requirements
The account must have read and write permission on the folders you use. For websites the document root is usually /public_html, /htdocs or /www. If listings appear empty, check that the account is not locked to a different home folder. For FTPS the server needs a valid TLS certificate; for self-signed certificates Ghost FTP asks you to confirm the fingerprint once.