WHAT DOES DEFRAGMENTING AND DISK CLEAN UP DO.?
When our computer save a file in Windows or DOS, the system finds the first available space on the drive and sticks the file in there. When you delete a file, the system simply marks the space as available. The deleted file leaves a “hole” among other files that can be filled in with a new file. If the new file will completely fit in the hole , there is no problem, but if the file is too big, well, the system sticks as much as will fit in the first hole, then finds the next hole and fills it with more of the file and so on until the entire file is saved. Each piece of the file is called a fragment, and the system embeds some info into the fragment to help it find all the fragments in the file. While the computer is working, it is constantly creating and deleting files, and eventually individual files are scattered as small fragments all over the disk dive. A fragmented file take longer to read into memory large fragmented files can really slow the computer. De-fragmenting simply rearra
