- Check the USB ports – Make sure the USB port you are using can work to plug in other USB devices such as flash drives.
- Try different USB ports – If the first port you tried doesn't recognize the SD card reader, try other ports.
- Check the SD card reader – Verify that the SD card reader is properly connected to the computer and that the card is inserted correctly into the card reader.
- Update the driver – Go to the manufacturer’s web site to ensure that you are using the current version of the driver that is compatible with the SD card reader.
