By default when you plug our devices to a PC it will only charge the device.
If you want to access the device files from the PC you need to enable File Transfer in the device settings.
To do this you can check this video:
- Swipe down from the top of your screen
- Tap on the notification that says "Charging this device via USB"
- In the USB Preferences enable "Use USB for - File Transfer"
https://youtu.be/a50VQ8pBcQ4