Does it show as charging when connected
sometimes the phone does not automatically switch to mtp
media transfer protocol
what usb port on the computer are you using - try another port
sometimes the phone does not automatically switch to mtp
media transfer protocol
- Slide down your notification bar while your Galaxy S9 is connected via USB to your computer
- Tap on the Android System notification for USB option
- Make sure File Transfer is the option selected for your USB mode
what usb port on the computer are you using - try another port