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Nebraska | actually the name of the .CNH file relates to what the date/time was when you last shut it down. You can't change it to a .YLD format for the info, Case's files are called voyager (.vyg). the .vyg file is the "index" to tell software how to read the info in the remaining 3 files in the .CNH.
If it is actually deleting the previous day's maps, maybe somekind of glitch in the display or possibly dead battery in the Card.
Size of cards used depends on firmware installed. | |
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