The one we recommend which is free to use is FileZilla.
This is a great tool if you need to transfer files from your machine to the hosting server you need to use an FTP (file transfer protocol) program and best of all its free!
You would use this program to setup / upload / download files from your website.
If you would like to do this on a site hosted by us, please let us know and we can provide you with the login information that is also required for this to work.
For more information about it, please go to https://filezilla-project.org where you can get all the latest information and support on using it.
You can download the client here just click on the green box to get the latest version