Quote - There is a set of Murphy's laws relative to business. One was that you will always fill up the space available. Meaning that if a company built extra offices for future expansion, they hired bodies they didn't need to fill up the space sooner rather then later and long before they actaully needed the people. Got a 1T drive last spring and fit Murphy's law as I got real careless on what I kept and what I didn't. It's easy to do when you have all that room.

It's the general form of Parkinson's Law.   The law was originally "Work expands so as to fill the time available for its completion"  but several corollaries have been added on to it, including "Data expands to fill the space available for storage."  The Law has been generalized to: "The demand upon a resource tends to expand to match the supply of the resource."

Using the office example, it happens twice: first the number of people expand to fill the space, then the work fills to match the number of people.