“One more thing,” as Steve Jobs used to say while driving the engineers crazy. Well, one more way your computer slows down is when the drive gets too full. Joy’s laptop drive was three-quarters full when she decided to run WinDirStat, another free program from It tells you what’s hogging your drive.

It turned out that somewhere along the way she had created a clone, an exact copy of everything that was already on the drive. This meant everything had been duplicated, which naturally enough took up twice as much space as before. It was quick work to get that copy out of there and transferred to a flash drive.

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