Solved: Seagate HDD beeps every now and then (?)

Hi guys,

I got a 2 TB seagate hdd, bought about half a year ago.
Sometimes when browsing the web using firefox and using utorrent it emits a short loud beep and everythings seems to freeze for a split second (?) I'm guessing this is due to a lot of write actions.
I'm guessing it's either the hdd itself that's making the sound or my motherboard.

Crystaldiskinfo shows everything's fine.
However, should I be worried?

Thanks for any advice!