How to download all files from watch to Windows?

I wonder how I should do to download all files from my Garmin Venu 3 to my Windows computer?

According to my file manager, it should be ~2.6 GB on the watch.  But I can only download ~16 MB (directory \\Venu 3\Internal Storage\Garmin\ ) to Windows.  The watch has a total of 7.08 GB of which 2,96 GB is used.  Whrere is the rest of the data?