To export and download your ePortfolio, go to Manage ePortfolio > Select Export to HTML
You will then see an option to export either All Pages or Published Pages Only
Once the export is processed, you can download the file.
The zip file that is downloaded is an HTML archive. It should include all files, images, and necessary pieces to re-create the ePortfolio as a website. These are all linked together via the index.html file contained in the folder.