Hama Wi-Fi wireless data reader for memory cards and USB flash drives, with battery for mobile use, optimal for Apple, Android devices and Kindle Fire with a free app (including SD / SDHC / SDXC, USB 2.0) (Accessories)
I have / had decided to use a WiFi data reader as OTG does not work when Kindle Fire HD. That part works great, the initial setup is very easy and carried out via a micro-USB cable that is connected to a computer. It is possible glecihzeitig with App