I have updated my GO500 with the Europe, Australia & New Zealand maps but the USA map continually fails to update. I have tried deleting the Home 3 folder several times but still get failed install. Tom Tom support said it was antivirus and firewall issues so actually tried with them shut off but still same result. Have plenty of space for the maps as Europe & USA on 32GB SD card and Oz & NZ on the device. been trying now for 3 days to get USA to update can't believe how slow download and install actually is; just over 1 hour for update each time to fail.