You're connecting your USB4 device or dock to a dock that doesn't support USB4. You're using a cable that doesn't support USB4. The attached device might have limited functionality because it's not using USB4. Your device or dock supports USB4, but it's plugged into a port on your PC that doesn't support USB4. Make sure you use the cable provided by your device or dock manufacturer or a certified USB4 cable.Ĭonnect your USB4 device or dock directly to your PC or only to USB4 docks. Make sure your PC supports USB4 to get the best experience from the attached USB4 device or dock. Make sure the USB4 device you're connecting to is supported by your PC. MHL device functionality might be limited Thunderbolt device functionality might be limited USB device functionality might be limited USB4 device functionality might be limited Here are some USB-C notifications you might receive if there’s a problem: Note: If you're having trouble downloading photos, see Import photos and videos from phone to PC.

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