For some reason I went to use my TomTom 730 after approx 3 months, it lost the map & voices....I don't think the internal drive is working at all.....when I check the drive letter in my computer, its asking for a disc......Was there a problem with the internal drives in these units, and what should I do to test it......Note: when I plug it into my dock station it takes forever to connect to the computer. I think its loading the SD card.....I have tried it without the SD card and it won't get past the screen where its looking for the SD card.
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