This is an open source SDCard reader that uses the GL3224 chip solution with a maximum transfer speed of 100MB/s.

• equip with a transparent plastic shell
• write protection switch, suitable for inserting into an unfamiliar computer for reading
• 4 layer PCB Design, USB 3.0 and SDIO traces are impedance matched and have equal lengths

You can make your own with the design files, or if you prefer, you can get one from my Tindie store https://www.tindie.com/products/johnnywu/opensource-usb-30-sdcard-reader