First of all download Filezilla from the below mentioned URL:
http://filezilla-project.org/download.php?type=client
Once you download and install it, kindly follow the below steps:
1. In Host, enter either FTP IP [
ftp://IP of domain] or host name [
ftp://ftp.domainname]
2. In username, enter FTP username
3. In Password, enter the password of above FTP username.
4. Do not enter anything in the Port
5. Then QuickConnect
6. Once it is connected to the FTP, you will see the list of files or folders present on the server at the right hand side. The list of files/folders at the left hand side is from the local computer.
7. Navigate to the required files/folders at both side. and then download/upload by right clicking on the file/folders object.