You can use a USB flash drive for much more than storing data. If you’re running Windows Vista, you can use a USB flash drive to speed up your system with the ReadyBoost technology.
ReadyBoost uses the storage space on a USB flash drive as an additional memory cache to aid the memory cache on your hard disk. Since flash memory is faster than a hard disk, the memory cache provided by ReadyBoost significantly improves system performance.
ReadyBoost is not difficult to use. Simply insert your USB flash drive into your computer and follow the onscreen prompts to configure and use ReadyBoost.