Export & Import Master Data

I need to export the master data from a copy to create a new company and import this master data.

I'm trying to use the step-by-step by the link below, but the export is running more than 48 hours and never finish!

http://blogs.bojensen.eu/2012/01/20/how-to-copy-configuration-and-setup-data-from-one-environment-to-another-environment-in-microsoft-dynamics-ax-2012/

What is the best way to copy a company? Thanks!