Why can’t I download from approach 30

The Approach G30 will sync via the Garmin Connect mobile app and then scorecards are viewed through the Garmin Golf app. 

If you are not seeing the Garmin Golf app displaying the scorecards after syncing through the Garmin Connect mobile app...there may be too many scorecards to sync all at once if a bunch have accumulated. 

The other method of syncing may be best if there are a ton of scorecards needing syncing where you connect the G30 using the data/charging cable to a home computer using Garmin Express to transfer the scorecards. More info through the link here: Syncing Scorecards to the Garmin Golf App