What are the upsides to using an FTP server (hosted by a third party) to transfer (and maybe store) files when compared to just sending through email? The language of choice is C#.
Email looks easier to implement and if it was going to Gmail then server hosting and upkeep would not be a worry. However, I am not experienced with FTP servers and don't know how big of deal setup and upkeep is on them. All that is being sent is a bunch of text files, most likely each under 1 MB. Security is not a big deal at this point, but I am curious which is more secure without doing a lot of extra setup work.