Hi,
This is Wil, one of the independent advisor and an expert with Windows 10.
I understand your concern about connecting your hard drive to your laptop.
HDMI cable are used to transport audio and video signal while USB cables transport data. If you wish to connect your hard drive to the laptop, it needs to be done using a USB cable depending on the hard drive that you have. Can you please provide me a picture of your hard drive so I can see the ports on it like the one on the picture below.
I hope that you can reply back as quickly as possible so I can help you out further. Have a nice day.
Thanks,
Wilfred P.
Independent Advisor