Download your template file (*.stp) and expand it.

First, download the site template from the solutions gallery to a file, I usually create a directory called solutions for this procedure:

1. Navigate to the top-level site of your site collection.

2. Click Settings, and then click Site Settings.

3. In the Web Designer Galleries section, click Solutions.

4. To download the solution, click its name in the solutions gallery, and click Save. Then, in the Save As dialog box, browse to the location where you want to save the solution, click Save, and then click Close.

Now, you will rename the file from the command prompt to cabinet file or *.cab file.

Extract the files

I am using 7zip to extract the files from the cabinet file.  I will then place the files in the solutions directory in a directory with the name of the file (in this case it was TemplateX2). 

Note:

All files that are actually just cabinet files (*.cab)

• .dwp = SharePoint dashboard or web part file
• .stp =  Sharepoint list or library template
• .wsp = Windows SharePoint solution file

 

by Tony Di Leonardo via Everyone's Blog Posts - SharePoint Community