Every time you use your PDA it gets littered with file fragments and debris you can't see. Temporary files are created by almost every application and unfortunately not every one of them takes care of removing this garbage. As a result, over time, valuable space on your device is wasted; keeping an increasing number of unwanted and useless files. The amount of generated garbage greatly depends on installed applications and your pattern of activity and may vary with time.
Besides of wasted space, all of this garbage also slows down your whole system. Your PDA looses performance in searching for important information in the piles of garbage. Increased workload is also required for managing and sharing system resources among the loaded applications.
Last, but not least is privacy. All the sites you visited and images you saw are stored on your device. Temporary files, cookies, and history archives keep track of your activity, your habits, your interests. The fragments of documents, pictures, sounds, history of your browsing may contain sensitive information which you, obviously do not want to share with others even by an accident.
Clean up your Pocket PC and maximise your space!