I recently purchased this XXL 550TM from Best Buy and followed all the instructions for downloading the lifetime map/traffic, however my computer randomly shut off during this process. I'm guessing about 70% of the map got downloaded. I turned on the GPS, selected the USA CANADA and MEXICO map, and this is what it says: "Problem with map. You cannot use this map on this device." \n\nSo I went onto TomTom Home 2 > Manage my device > Items on device and I cannot find 'Maps' anywhere. Its only found downloaded on 'Items on computer'\n\nAlso, when I tried to download the map again, I got a reply saying not enough memory space.\n\nSo what can I do now? Can anyone give me a step by step to fix this? Any help would be greatly appreciated.