Duplicating a WordPress site on a new machine?

So, I thought I had this figured out. I'd use Tools->Export to export an XML file. I'd move it to the new machine. Then I'd use the WordPress Importer to import it.

Except the importer says it's limited to 2MB and my XML file is 109MB.

So, what do I do now? How do I duplicate a WordPress site to another machine?

thanks!