vibrates

Okay so my HDD is dead. I'm now looking for a second storage device for games and video files as i have pretty much used up all the space in my 240gb ssd. So I have a couple of questions: how big would the difference be between an external 5400rpm drive vs an internal 7200rpm hdd be? should I...

Hi Guys, was wondering any of you encounter this issue? my D15 vibrates not sure why though at first i dismantle everything and found out it was the bracket that was loose. i tighten all the necessary screws and still it vibrates any idea why? i have also check that the fan provided doesn't...