Shouldn't be different from Ride with GPS instructions for Garmin edge 500:

to start, export a GPX Track (no cuesheeet or turn directions) or a TCX (custom cues) to your local computer. Plug in the GPS unit and open the folder to view the contents. It will have a Garmin directory, which you should open up. Inside the Garmin directory, there will be several folders/files.
One of these should be “NewFiles”. If it doesn’t exist, you’ll need to create it by right-clicking and selecting “new folder” or something similar (depending on your computer). Make sure you get the capital.
Once the folder is created or if it already exists, drag the exported file you saved from our site, to the “NewFiles” folder.
Now, safely remove the device (like you would a USB flash drive, by clicking the ‘remove device’ or ‘stop device’ icon in the lower right corner of your computer screen. again, this is operating system dependent).
Unplug the device, turn it on and head to the Courses menu item. Your file should be in there.