I have a Nuvi 1300 that when connected to my Windows 10 Pro x64 desktop only shows up as a USB Mass Storage in the Safely Remove list. There's not a thing wrong with the GPS, but Disk Management insists the internal storage isn't partitioned and the SD card needs initialized. I can put the SD into the desktop's card reader and it's fine.
Garmin Express can't detect it.
Other devices connected with the same cable, same USB port, work properly, so it is not the cable or USB port or Windows' USB mass storage drivers. I've tried other cables and ports (ALL of which work with other devices).
Bookmarks