Did you use only a Windows PC to format the cards FAT32? It seems the device is objecting to the format and not even looking at the card's contents. If you used a MacOS it formats slightly differently from Windows, also sometimes even the built-in format tool in Windows Disk Management can cause problems with some garmin devices, the latter is very rare with cards but common with internal memory formats.

If you don't wish to format the card while it's in the device as prompted in your Pic 5 of Post #24, try using the official SD Formatter tool:
Code:
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