Simple and effective product. Once the adapter is plugged by the micro-usb port on my S4, I connected a USB drive which was immediately recognized by my Samsung S4, and I was able to use my smartphone with the data it contained. One star less because the packaging is not great and the adapter was a bit jaded: it took "straighten" the female USB port as crushed during transport (I guess). But everything works, phew. Product that does what we hope for and really cheap.
