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![ To use the defrag tool, just
enter defrag followed by the parameters you
want to use. As usual, you can view the
command’s help file by entering defrag /?. Then
to use defrag, just enter the following, like you
would with many command apps.
Syntax :-
defrag [name of your drive]
[parameter] [extra parameters]](https://image.slidesharecdn.com/defragmentation-161018035754/75/Defragmentation-13-2048.jpg)


Fragmentation occurs over time as files are saved, changed, and deleted, storing file data in different locations on a volume. This causes hard disks and removable drives like USBs to work less efficiently. Disk Defragmenter rearranges fragmented data to improve efficiency. It can run automatically on a schedule or be used manually to analyze and defragment drives. Defragmentation consolidates fragmented files so the drive works faster by reducing read/write head movement.