the photo that shows the unit is a bit misleading, with this dive against giving it importance and a sense of grandeur. in fact, it is smaller than expected, and light. I do not hesitate to take it with me in the camera bag. it's actually a quick drive. I tried it with extreme sandisk card 30MB / s. it shows how the flow limitations encountered with other materials are not always those memory cards or USB ports. there are several physical locations, each accepting several close card formats: each location is given under Windows as a separate drive letter, allowing to make transfers from one card to another.