The enhanced file transfer features are available in the
sftpg3 command-line tools with SSH Tectia Client with EFT Expansion Pack. The server must be running SSH Tectia Server with EFT Expansion Pack, SSH Tectia Server with Tunneling Expansion Pack, or SSH Tectia Server for IBM z/OS.
With SSH Tectia Client 5.2 and later, the following features can be used:
Checkpoint/restart for transferring large files
Streaming for improved file transfer speed
Prefix for ensuring that a file is fully transferred before it is used