SD-Card Only, it does not work with a USB 3.0 thumb drive ? These are faster in read/write, but I did had some issues with it. Now I am afraid to even use it, even on SD-Card. I'm not an expert on Android, but doesn't Android see an USB thumb drive also as a SD Card? Or does it handle it differently internally?
If using an SD Card over USB thumb drive is better supported for expanding the internal storage, I might give it a go and invest in a fast SDHC card. I believe with latest version of f/w and Android 7 (Nougat) the Q5 Pro also support SDXC (UC3) cards? Bigger storage and faster speeds!
Thanks for any reply in advance