Completely Confused by Disk Usage
My 80GB drive is just about full. It's so full I cannot perform a system update. I am flabbergasted at this, as I have virtually nothing on my hard disk. My girlfriend has a macbook and she is experiencing the same issues.
There is nothing particularly interesting about how I use this computer ,that the hard disk would be full. I even keep my iTunes library on another drive completely.
I ran Command+I on each folder in my home directory; this covers the location of all my documents, photos, videos, etc. I added up all these values and it comes to just over 40GB. So somewhere on my system there is 40GB (!!!) of space being used for apparently no reason.
I would understand between 5 - 10 GB for applications and the OS, but 40?!?
Would anybody be able to help me understand how Mac OS X uses the file system and perhaps why I have 40GB of mysteriously used disk space?
Thanks
MacBook, Mac OS X (10.5.2)