Storage - either HDD (Hard disk drive - slower of the 2 but cheaper) and/or SSD (stable state drive. Insert the 2 assemblies of extractor plunger springs and plungers into their respective holes, after greasing the plungers. https://Products-dd.com/category/%e0%b9%80%e0%b8%84%e0%b8%a3%e0%b8%b7%e0%b9%88%e0%b8%ad%e0%b8%87%e0%b8%9f%e0%b8%ad%e0%b8%81%e0%b8%ad%e0%b8%b2%e0%b8%81%e0%b8%b2%e0%b8%a8/