I have a similar problem, but its 30gb that I cant find.... 'get info' and 'what size' sais I have 73.4 GB on my HD, used 63.4, available 10.9 , but if I add up the size off all the files/folders it only comes to 32.53GB.
So what is using the other 30GB?
How do I find out and get rid of it so...