Solution Nexus7 Pre 2013 old version Android 5.1.1
https://youtu.be/o5aAJfYU8r8
Highlight (press and hold) and double taps are used often.I had to re install to erase all my futile attempts. Any maps that are not already in the chart downloader seem to only
work if installed on portable memory, flash or SD worked for me, and doing all the directory building and file placement in the windows
environment, then I used the nexus media importer app.
Happy to walk anyone through that first successful map install.
Now off to
Belize to learn up. For someone who never gets deep into chart plotter options or is really not interested in winning the
race, I am liking this.
Thanks to all.