1. Uzip the folder.
  2. Upload the slidervilla-post-attachments-addon folder to your /wp-content/plugins directory.
  3. In your WordPress dashboard, head over to the Plugins section.
  4. Activate SliderVilla – Gallery / Post Attachments addon.

It is important to note that SliderVilla Add-ons are extra piece of code to add more features in compatible SliderVilla Sliders. You need to have a compatible slider plugin installed before using SliderVilla Add-on. You can check the list of compatible SliderVilla Slider plugins on individual add-on page.