Simply connecting microUSB to USB-C Adapter to hub, flashdisk, or other dongle doesn’t work. I have to use a small gadget labeled ‘OTG Micro USB Hub’, powered by charger/powerbank and then connected to USB-C adapter. Then you can connect your usb thingies to the available ports on hub, or even daisychained to other hub to get more usb port.
@Marcus : does this OTG Micro USB Hub supply power to both the guest and host devices or only to the guest devices or host device ?
Hub provided power for both tablet and USB Gadgets, my 2.5 SSD and HDD External disk working simultaneously with logitech wireless keyboard/mice dongle and lamp on the disk keep lit when I remove the hub from tablet.