How to split and combine files

How do I split and combine files in Windows?

I need to split large files into several small sized files and then combine them after I transfer them to another box.

I'm fine with doing this on the command line.

I tend to compress the required file to a ZIP file, setting a maximum file size so that it gets split.

This means that you will always have the program to get the initial file back available.

If you just want to combine files (which have already been split somewhere else) you can do this in a Windows command prompt natively:

copy /b example.ext.001+example.ext.002+example.ext.003+example.ext.004 example.ext