You can upload GPS tracks that have been saved to your PC in GPX format. The GPX is a widely accepted open format, and most software provided with your GPS logger will have this capability.
Select Track Upload on the navigation bar
Click on Upload Track
Click on the “Choose File” button to browse your folders and select a GPX file
Select the track you want and click Upload
The selected track will appear in the Upload Track dialog
Uploaded tracks will appear in the Track Uploads page as uploaded from manual