docs(transfer): add how-to download files (#745)
docs(transfer): add how-to download files (#745)

also add information how to browse your app
files directory, which is hard to find.
I needed very long time to check where my files are.
klirix/ionic-native,xueron/ionic-native,driftyco/ionic-native,klirix/ionic-native,ramonornela/ionic-native,driftyco/ionic-native,driftyco/ionic-native,xueron/ionic-native,klirix/ionic-native,xueron/ionic-native,ramonornela/ionic-native,xueron/ionic-native,ramonornela/ionic-native,ramonornela/ionic-native