I got opportunity to review the new Transcend USB-C OTG card reader called RDC2. It’s a great device. It has SD and microSD card slot, USB 2.0 port, while you can connect one of the card and USB device simultaneously so you can for example make a backup of photos from your memory card to USB flash drive as you can see on the video. Or you can connect your mouse or keyboard to a phone/tablet.
If you have any questions, write them to the comments below and I will try to clarify it for you.
More informations about the card reader: https://www.transcend-info.com/Products/No-733