Transfer resumption and partial transfers in FTPSBlackbox - SecureBlackbox®
Most FTP servers support partial transfer of files using REST command, but not all clients are able to properly use this support.
With FTPSBlackbox you can transfer parts of the files. If the transfer is interrupted you can always resume it. And if you need to upload or download only a part of the file, you can transfer the needed part without the need to process the whole file.
Server-side FTP classes of FTPSBlackbox support partial transfers as well and let your application make use of them.