We work with auto makers and often receive files from them and send them files as well. I am currently in need of an secure upload or SFTP solution, that is used/accepted by major players (which makes it acceptable to companies like auto makers as well). This will be a solution, by which I can have a client upload a file to me, through a web interface. The ability to send files to my cliens, using the same interface/website will be an added bonus. Please note that I am not looking to build a website.