Does WhatSize search for hidden and system files too? If so then all good, if not I'd be using a search tool like EasyFind (or other like Find utilities) to search for all files (including invisible & system) modified on today's date and look at the items at the top of the list (including their sizes. That might give you a solid clue as to what the files are and where they are coming from. Cheers, Coj On 25/01/2008, at 4:07 AM, Robert wrote: > Hard drive is still running like crazy. A minute ago it was down to > 24 gb and now its gone up to 36.56 gb and is now starting to drop. > With in 15 seconds it has dropped down to 34.81gb. Bob > _______________________________________________ > X4U mailing list > X4U at listserver.themacintoshguy.com > http://listserver.themacintoshguy.com/mailman/listinfo/x4u > > Seven Cent Deals - Great legacy stuff Great Legacy Pricehttp://www.drbott.com/prod/db.lasso?cat=Seven+Cent+Deal