You have 3 options for FTP address.
1. ftp.yourdomain.yourtoplevel (com, net, info, etc…) So, if your domain ends in .com, it would be “ftp.yourdomain.com”.
2. ftp.888-hosting.com
3. ftps.888-hosting.com – This is used when you want to have a secure socket layer connection for your FTP but do be aware that this will only work with your cPanel username and password.