Melody, it is good to read that things are now working.

Pikku Myy, I am not sure about "Unplug" unless there is no alternative. "Shut Down" and "Restart" are both fine because the HDD will spin down in a controlled way.

There is a risk that pulling the plug could lead to an uncontrolled spin down of the HDD, which might damage it. Most HDD spin at 7200 rpm and the read-write heads (which transfer information from/to the HDD) are very close to it, sometimes as little as a few nanometres. Cutting the power abruptly means that the read-write heads could hit the HDD which is likely to lead to fatal damage to it.