DEFRAGMENTATION

When you save a data file to your hard disk , the operating system will try and store the complete contents of the file to the same section of the hard disk. Once the disk starts to become full, this process becomes impossible to achieve & the operating system splits the contents of the file over sections of the disks - the files become fragmented. Defragmentation is a utility that you can run over your hard disk to put the defragmented files back together.