You can back up your recorded data to a USB storage device. You should back up regularly to help prevent data loss. This is also useful when you need to transfer data to another device.
From the
Garmin eLog™ app, select
Settings > Back Up Data.
Insert a USB storage device into the USB port on the
Garmin eLog adapter.
The light ring on the adapter glows green and plays a tone when it is ready to back up data.