If you have a WordPress.com blog that you wish to move to a new hosting account or to another folder, you can do so by following these instructions:
- You first need to have both open and active web hosting and have WordPress installed, up and running before transferring your content.
- In WordPress.com blog, go to Tools > Export and download the XML (WXR) file to your computer.
- In your new WordPress admin area, go to Tools > Import > WordPress and upload the file you downloaded in step 1. Make sure that you choose the option to Download & Import file attachments.
The above assumes that you are using the latest version of the WordPress software.
More detailed information on this can be found here: http://codex.wordpress.org/Moving_WordPress