I have a 24 inch 2009 Imac with a 320 Gb hard drive and 2 Gb of RAM. I recently performed a clean install of Snow leopard and am now using version 10.6.8. Here is my problem: I am apparently using 299 GB of space on my hard drive. This is impossible. I, along with Omnidisk and DiskInventoryX calculated around 54 GB of usage. I have 7 albums of music on Itunes. I have about 1000 pictures on iphoto from my iphone. That's it. My User file contains around 11 GB. Application file- 10 GB Library- 6 GB System - 5 GB Music - 3 GB It then descends from 400 MB down to 40 kb's. Where are the other 250+ GB coming from?? A friend of mine with the same Imac packed with music, photos, photoshop, etc is only at 130 GB of used storage. Something is not right... I can say that recently I performed a time machine back up of my hard drive onto an external one. I then performed a clean install of Snow Leopard on my Imac. After having trouble figuring out how to pick and choose what I wanted to place back on, I used migration assistant to restore all of my files. (I know this defeats the purpose of a clean install but I'm not tech savy and I was worried I wouldn't be able to retrieve all of my information). I wonder if this has something to do with my current situation. Either way, I feel that my hard drive should be practially unused for the amount of files I have. I appreciate any advice you can give me. Thanks in advance.