Is it possible for a Garmin to "fill up"? As in, I was terrible about actually downloading my workouts to my computer (my last upload was September 1, 2012). It turns on but before it even gets to "locating satellites," it shuts off. When I plug it in to charge, it says "Charging" but shows 100% battery level. I've plugged in the Ant Agent to my computer and my Garmin says "transferring data" now. The Ant app on my computer says the transfer is 23% complete. It's a Garmin 310XT and I've never had a problem with it before now. It's only 1 1/2 years old. Is it possible that it filled up it's memory as a result of my failure to upload online? I can't find it in the Garmin FAQs online...and I have a race in less than 2 weeks. HELP.