I use this to transfer files from our Nikon camera memory chips to our computer USB port. Although the cameras came with USB cables to transfer photo files, the transfers and link up times can be excruciatingly slow, especially on the S220 camera. By plugging the memory chip into the adapter and the adapter into the USB port, transfer rates seem at least tripled for my P90 and 10X faster for the S220 running the exact same Nikon supplied software.