FileZilla can be used as a free Secure File Transfer Protocol (SFTP) resource.
Download the software from https://filezilla-project.org/download.php?show_all=1. Note, that the download link on the FileZilla home page may include bundled offers. It is recommended to un-select the extraneous offers during the software installation.
Detailed instructions to add files to a student or faculty Web Space using a Secure File Transfer Protocol (SFTP) client.