Hi, I'm new to this so excuse anything ignorant I do! I bought a map update for an old Nuvi 20 and have tried for 2 days to download it onto the GPS with no luck. There's an SD card it sees so that's not the problem. It starts fine, but within a few minutes the download drops to 0! And a few minutes later it tells me the install failed. The problem is not my ADSL LINE as other downloads and updates work fine. So my question is can I download and get the GPS maps updated through another method? Or is there a trick to solving the constant failures. I swear I've tried 40 times! Even reinstalled Garmin Express, but that too didn't help. I'd really appreciate the help of any expert out there! I'm tearing my hair out....