SD card reader update from USB 2.0 to USB3.0, not only speed up the tansfer (Transmission is 10X faster than usb 2.0 USB C Device: Compatible with Pad, for Pad Driver Free, Plug and Play & easy to use USB C Phone or other USB C device support OTG function 1. Please make sure that your USB C Phone or other USB C device support OTG function, 2. Only one interface can be used at a time, not support use 2 or 3 interfaces simultaneously, 3. All the USB C device cant recognize NTFS format, only support FAT32 format, please backup the files on your SD card and format the SD card into FAT32 format.