Can't sync my garmin 530 with express.
Error message: some files could not be sent to your device
* Activity-summary (transfer error)
* metricks - file (transfer error)
* install_app (transfer error)
* metrics-file (transfer error)
* metrics-file (transfer error)
........
about 30 files -- all with "Transfer error"
Many appear to be duplicates like: Metric-file and activity-summary