Macbook uses too much HDD space

Hey guys,

just bought my mac couple days ago and of course uploaded some stuff. But it declares that I am using too much storage.

I am using something like 50-60 gigs but it says that I am using 120. Don't get it(

Anybody knows what has gone wrong?

Thx in advance!

oops, sorry guys. all these unseen data were in trash.

p.s thx to disk space utility