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  1. #1
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    Default What are .SUM files

    Hi,

    I have a Nuvi 3790 and was looking to update my Junction View to HighRes

    In the folder X:\.System\JCV

    I have 2 files:
    D3048050A.JCV
    D3048020A.SUM

    I am wondering what is the .SUM file

    Any info appreciated.

    Thanks.

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  3. #2
    Navigation software expert Kanopus's Avatar
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    It is 4-byte checksum of a file. You can delete it.
    Thanks, Kanopus

  4. #3
    Navigation software expert

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    Quote Originally Posted by BuckyBKatt View Post
    I am wondering what is the .SUM file
    SUM-file is used by Garmin GPS navigation devices; contains a checksum for a corresponding file on the device, such as a map (.IMG) file or a voice (.VPM) file or a Junction View (.JCV) file etc.; generated when a diagnostics test is run on the unit, either by the user (from the diagnostics menu) or from the Garmin site for example, during the update process.

    SUM-file can be deleted and the device will still run properly ...

  5. #4
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    Thank you gentlemen for the informative replies

 

 

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