Finder seems to think my 500 GB drive only has 58 MB free and won't let me put any more large files on it. However, there is only 356 GB worth of data on the drive (confirmed first by counting, then using Disk Inventory X software). I'm pretty sure this happened in one instant within the past couple of days. Disk utility seems to think everything is fine. Also, even when I delete gigs and gigs of data, it still reports the same space available. What happened and how do I make it report the volume correctly so I can use all the space? Thanks for any help.