The files on the disk are arranged according to the storage time, and so on. Theoretically, the files are arranged closely without gaps.

But we often modify files, so the new content is not directly added to the location of the original file, but placed at the end of the disk storage space, and the system will add a contact mark between these two sections.

When modifying multiple files, there will be many discontinuous files on the disk.

Once the file is deleted, the discontinuous space occupied will be empty and will not be filled automatically. Moreover, the newly saved files will not be placed in these places. These empty disk spaces are called "disk fragmentation".

There are too many fragments and too many other discontinuous files. When the system operates files, it will greatly reduce the efficiency because of repeatedly looking for contact files, which directly reflects that it feels slow!

Knowing the basic principle of disk fragmentation, I think you should know the solution.

Generally, in all versions of Windows systems, there is a "Disk Defragmenter" under "Programs", "Accessories" and "System Tools". When this command is executed, a large number of hard disks will be read and written, and a large number of scattered files will be placed at the end of the disk, and then written into the associated files. Finally, there are basically no scattered files on the disk, which will slow down the running speed of the system.

Therefore, the remaining space of each disk can't be less than 15%, otherwise it can't be defragmented!

But we also know that disk defragmentation has a great influence on hard disk, and it is the most frequent hard disk reading and writing operation!

So, is it necessary to clean the hard disk? Take XP system as an example, its defragmenter has the function of "analysis". After the analysis, it will report to you. If it suggests that the disk needs defragmentation, then it really needs defragmentation.

Finally, there are many non-Windows defragmentation software, all of which claim to be fast and effective, and the famous Vopt is one of them. But in fact, defragmentation software such as Vopt doesn't really physically defragment the disk, but just adds some hyperlinks. After finishing, the speed may be fast on the surface, but it will soon return to the original chaotic state. If Vopt is good, why doesn't Microsoft integrate into the new version?

Therefore, the best defragmentation software comes with Windows, which physically defragments the disk in the real sense. So when running, the speed is very slow, which usually takes several hours.

Also, when defragmenting, don't run any programs. It is best to close all programs that run automatically and reside in memory, and close the screen saver. Otherwise, defragmentation will be extremely slow and even start again. The space efficiency of the disk can be better utilized.