In the documentation i found THIS sentence:
"Use ‘root’ for USB access – Android only. If the Android device is ‘rooted’ the application can try and use it during the USB connection. Can help on some Android devices that have not full USB Host function."
I have a 7" Galaxy Tablet 3 - it seems not to provide USB-host. I´m thinking about ordering a 7" Tablet 4 - but it also doesn´t provide USB-Host.
Not a too big issue - because i anyway will use my TP-Link for controlling the D800. That works very well - and the tablet is rather cheap.
The USB-Host/OTG capable 10" Tablets cost almost twice the price of the 7" - and for just evaluating the whole thing that´s pretty much . .
Does "use 'root' for USB access . . " mean there might be a work-around the missing "USB-host"? (just an idea

best, Klaus