networking - How to continue file transfer to LAN target on Windows?

I have a big file, and I wanted to copy it to the other machine. (Both runs on Windows 7 x64.)
The network speed is terrible, so it took hours to get even 25gigs copied over. And then, the network died.

Now I would like to continue the transfer, but I used Total Commander. It can overwrite the file and such, but I want to continue. I'd prefer to continue, and keep the already copied portion.

What software can do this?
I've checked Robocopy, TeraCopy and Total Commander. No luck so far.