Navigate to Computer\<phone name>\Phone\NEON\NavLogs (some phones do not allow you to access this directory. If this is the case you can use a free app, Airdroid, which will allow you to access the phone's file system from a web browser on your PC)
Find the logs that you want to send. Logs are named with the date and time stamp.
Zip and Email the .nav files with a description of what the user actually did (ground truth), and any errors that you experienced.