@Keith
Your device is in MTP mode so some folders aren't shown. Importantly, .System folder is missing but will show in Mass Storage Mode with the proper Windows File Exporer settings. Read the following 2 posts to understand: [Only registered and activated users can see links. ] and [Only registered and activated users can see links. ].
If you are missing anything when you have compared your files and folders to Garman_Nuvi's Snap2HTML expandable file 'DS 55.html' he will surely accommodate you.
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