Defragmentation puts these pieces back together again. The result is that files are stored in a continuous manner, which makes it faster for the computer to read the disk, increasing the performance of your PC.

Does defragging help speed up computer?

Defragmenting your computer helps organize the data in your hard drive and can improve its performance tremendously, especially in terms of speed. If your computer is running slower than usual, it might be due for a defrag.

Is it good to defragment your computer?

Defragmenting is beneficial for HDDs because it brings files together instead of scattering them so that the device's read-write head doesn't have to move around as much when accessing files. ... Defragmenting improves load times by reducing how frequently the hard drive has to seek data.