Hy there
I tried to connect my etrex 20 to the Android 6.0.1 with an OTG cable.
Etrex shows: "the usb cable is connected to the wrong adapter". I then told OK and it started like a GPS, not like a Storage.
I then had a look to the Setup/System: "USB Mode: Mass Storage". So all OK.
Maybe the problem comes from Android? I think so.
I connected my Canon Camera to Android: all OK, I can see all the pictures.
Should I change something in the Android Setup? Do you have an idea?
Thank you