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Removing Files that Fail to Sync in Garmin Express from the Computer
The Garmin Express™ software stores activity and wellness files in a folder on the computer before uploading them to your Garmin Connect™ account. After a successful upload, the files are deleted from this folder. If a file contains data that Garmin Connect cannot import, the activity will fail to appear in the account but the file may remain on the computer which can prevent other activity and wellness files from syncing. This will often be accompanied by the error message "There was an error syncing with Garmin Connect."
Files from the computer can be removed by using the Clear Upload History feature in Garmin Express. Below are steps to complete this process for both Windows and Mac personal computers.
Open Garmin Express.
Choose your device that you are having an issue syncing files from.
Select Tools & Content.
Select Utilities.
Under Clear Upload History select Clear History.
Select Continue.
You will see the message Cleared upload history! in Garmin Express.
From here, you can attempt to sync your device again. If issues persist, you may have a corrupt file on your device that may need to be manually removed and discarded. See Related Content for instructions on manually locating and uploading the files. Any files that fail to upload manually are unusable and should be discarded from the device. Future activities will now sync without errors in the Garmin Express program.