I have an external hardrive with all my files in it, so on my main computer I should have at least 20 gigabytes but I have none, so I downloaded "Disc Inventory X" to find out what was taking up all my space and IDVD was taking up 9 gigabytes so I deleted it, so I started downloaded things again and used 5 gigabytes and suddenly everyday my space just started getting less and less. I deleted 15 gigabytes worth of songs on my itunes and I got about a gigabyte back only, then sometimes it would show up as 9 gigabytes or something, then it would go back to zero. I currently have zero and so I opened "Disc Inventory X" again. It shows a folder saying "private" (which I never created) and says it has 17 gigabytes in it. It showed this folder last time I checked too but it only had 7 gigabytes in it then. I have searched for this "private" folder on spotlight and found nothing. I don't know where this is on my computer, I cannot find it anywhere and am clueless as to what it contains. Please advise, I really need to sort this out. If I explained anything unclear, let me know and I shall try to rephrase. Thanks.