Garmin users like me if they can help me continuing my practice and I hope your opinion to see if we can get something specific and can be the solution to this mystery are saying if these models are purchased and want to get the impossible update box unlock maps if we try to complete formatting and replaced with a backup of the same model in question to be a older version which came on this device you think this could be solved because it still could not find out what the file which does not allow unlock map I suggest you can help and if anyone is encouraged to reformat a device could help a backup because I have several saved