How can I combine two files on Windows?

I have created a split file on a Linux system as indicated in this Unix.SE question. However, when I copy that file to a Windows system, I cannot recreate the original file. Using 7-zip gives me an error about it being unable to detect the file as a splitted file, and using copy first-file + second-file output-file gives me a 50kb output instead of the correct 7GB output.

What is the correct way to combine two files on Windows?

Solution 1:

Add the /b parameter to indicate it's binary:

copy /b example1.ext + example2.ext example.ext

Solution 2:

I've used HJSplit in the past with remarkable success. It's pretty straight-forward and simple to use, and it helps avoid typos on the command line (although the command line works just as well)