Mac disk space problem

Hi again, Since I posted the above problem I've been on a Mac forum and got the answer, thanks for letting me post anyway!

Same thing happened to me and I figured out the problem. Don't believe the amount of space left that is indicated by the mac. Its a flaw from the manufacturers. For some reason the file system reads the disk wrongly. To fix mine, I bought a new external hard drive, transferred all my personal files or vault you could say. including applications, music , documents, etc to the new external hard drive. (Don't remove the system files, etc). Just go to the finder . on the left you should see your user name icon , if you click on it, you should see all your personalized documentations and applications. That is what you should copy to the external hard drive and then delete totally from your mac and empty the trash of course.

Ok, moving on. After you ve done this, when you try to log in, it wont go through anymore with your normal username as you normally use, because all of your settings have been deleted and all. What you need to do is log in as "root" administrator and create a new account from scratch. After you do this, you ll find that all your drive space will be restored and the mac will read the amount of space you have left properly now and it wont mess up again. Well, mine hasnt so far.

Then you can attach your external harddrive and transfer your files and application settings and all. you should be able to get it back to normal as before with all your settings and all :) I hope this helps