I mentioned the length of time it took to evaluate an 80 GB external firewire drive in my review, but I felt I should add that an exactly as stringent examination of the computer's 80 GB internal hard drive, which similarly has only 9 GB free, was completed in under thirty minutes. Undoubtedly Tidy Up! was aided by the fact that I have 2 GB of installed RAM on the iMac G5 PPC running at 1.8 GHz, but even so I find the results very impressive.