If you open the template it will let you know where it is saved.see screenshot It is a good practice to save your templates here X:\Template\Borders\[Group]\[sub-group]
Here is a quick click on a best practice for saving you templates in Darkroom Core. Organizing Your Templates It is a good idea to save the folder in X:\Template\Borders\ that way when you move to a new PC everything remains relative to the X-Drive ...