Apparently could a few years ago the PC manufacturers not imagine that there would be one day SD cards over 1GB. So I thought it was repeatedly irritating if I gave someone the 64GB SD card from my camera to download some pictures, this was not recognized by the respective PC. This small reader now solves all these problems. No matter how old the PC is concerned, even if the interface is USB 1.0, it processed all SD card (Standard and Micro). Of course, at the other end of the scale is also USB 3.0 is no problem. So this little gadget bridges far more than a decade history of computers.