1. Check the connections between your external hard drive and computer.

1. Ensure the USB cable is securely connected to both your external drive and the USB port on your computer.
2. Attempt to reconnect your external hard drive to a different USB port.

2. Try accessing your external hard drive on a different computer.

1. Connect the external hard drive to a different computer.

3. Check the disk management tools of your computer.

1. Ensure the external hard drive is visible and accessible.
2. Verify that the external drive is formatted correctly.
3. Attempt to reformat the external hard drive.