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Tried to find a similar post to this one but couldn't. Got this message on my 2008 JDM lexus ISF. I wouldn't bother fixing it but now I can't access my reverse camera. Does this mean my HDD's corrupted?
Did you use the guy who re-flashes hard drives so they are translated to English, or is that just a translation app on your phone? I guess my question is: is the Navigation/Head Unit modified or factory?
Also, flowrider is right, the actual navigation data is just a dvd disk, which you can pick up online. I believe 2016 was the last year they made the discs, so try to get one from then.