Maybe you need to do some homework, hmmm?
http://www.pcguide.com/ref/hdd/file/ntfs/relFrag-c.html
The NTFS file system handles the storage of files and directories in a
very different way than the FAT file system does. FAT is a very
simple, and relatively "unintelligent" file system, that pays little
attention to how much fragmentation will result from how it operates.
In contrast, NTFS is smarter about how it manages the storage of data.
For example, NTFS reserves space for the expansion of the Master File
Table, reducing fragmentation of its structures. Overall,
fragmentation is less of a concern in NTFS than it is under FAT.
The superior disk management capabilities of NTFS mean that
fragmentation is reduced compared to FAT. Unfortunately, this led to a
popular myth--that NTFS volumes have no fragmentation, and therefore
never need defragmentation. Microsoft unwittingly exacerbated this
problem by not providing any utility to defragment NTFS partitions in
Windows NT, implying that defragmentation was unnecessary. But this is
simply not the case: NTFS partitions definitely are subject to
fragmentation. Many users of NTFS have never defragmented their
partitions at all, leading to avoidable performance slowdowns over
time.