*Source: PCStats (
http://www.pcstats.com/articleview.cfm?articleID=2160)*
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USB memory keys are compact little devices that can store and transfer anywhere from 128MB to 8GB of data, all it takes is a USB slot. As consumers, we've seen USB thumb drives evolve in storage size as well as speed, replacing the antiquated 1.44MB floppy disk in the process. As USB drives have gotten faster, Microsoft recognized that these little devices could serve a dual purpose, and act as a dedicated read buffer for a computer system. Essentially, what that means is the USB memory drive could be used to store temporary data the computer needs, instead of on the hard drive or in system memory. A hard drive is not as quick as solid state memory, so it can suffer from read latency. ReadyBoost was envisioned to allow the PC to temporarily store non-critical operating system data on the USB memory flash drive for quicker access. On paper, ReadyBoost has the potential to boost the speed of older PC systems and make running Vista a more comfortable experience.
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