Hello, Good afternoon. Could I ask a question? I have a Garmin Edge 530, and there is a map update. However, my memory capacity is in total 16 GB. The new update is over 10 GB,so, does the new update add to the existing one, or does it delete the previous map and install a new one. Otherwise, I cannot find the necessary space on my device. Thanks for your kind reply in advance. Cheers!