Question about Nintendo Classic Mini

You can load more games with hakchi (hakchiresources.com/2018/08...) just like with the Nes mini. Provided you find a suitable otg part, you can also load more memory for e.g. Turbo cd or Sega cd via a usb stick. Now my question: has anyone had success with a usb otg adapter available here? I tried with hama as well as with callstel but unfortunately without success...