I don't have time to post all the detailed steps (family visiting this week) but here is a copy & paste from the Google user manual page:
Transfer files between your computer & Pixel phone
Move files with a USB cable and a
Windows computer:
Unlock your phone.
With a USB cable, connect your phone to your computer.
On your phone, tap the "Charging this device via USB" notification.
Under "Use USB for," select File Transfer.
A file transfer window will open on your computer. Use it to drag files.
When you're done, eject your phone from Windows.
Unplug the USB cable
I put my music files in the Internal folder named Music and VLC plays those albums for me.
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