We have used a variety of FTP clients and servers to transfer data between locations. Typically, our clients (even the big ones) use the FTP tools included with the operating system. It’s great that they are there – and when used only occasionally or to do something quick and dirty – they do the job – but … we’ve encountered the occasional error with these applications because they are typically single-threaded applications and choke when you feed them large files.
An open source application, FileZilla is a fast FTP and SFTP client for Windows with a lot of features. Both client and server modules are available.