fat is unsecure ntfs is secure

The major diff. between FAT and NTFS is security, If you
have FAT partition then Security and Quota tap will not
available.
You can convert FAT to NTFS file system from convert command
in windows xp.

FAT has 2 types Fat16 and FAT 32. that is define the 
allocation of track and sector.  it is fix. but in ntfs we 
can allot the size of sector.

fat is unsecure ntfs is secure

" Fat stands for File Allocation Table
" There are two categories in Fat File System
o Fat 16
o Fat 32
" In Fat Up To Folder Level Security is available
" Compression Option is not available
" Encryption Option is not available
" Disk Quota Option is not Available
" FAT Supported By All Of The Microsoft Based Operating 
System

NTFS

" NTFS stands for New Technology File System
" There are three categories in NTFS file System
o NTFS 4.0 - NT O/S
o NTFS 5.0 - 2000 O/S
o NTFS 6.0 - 2003O/S
" In NTFS Up-to File Level Security is available
" Compression Option is available
" Encryption Option is available
" Disk Quota Option is Available
" NTFS Supported By only Limited Microsoft Based Operating 
System

NTFS
1) allows access local to w2k,w2k3,XP,win NT4 with SP4 & 
later may get access for some file.
2) Maximum size of partition is 2 Terabytes & more.
3) Maximum File size is up to 16TB.
4) File & folder Encryption is possible only in NTFS.
FAT 32
1) Fat 32 Allows access to win 95,98,win millenium,win2k,xp 
on local partition.
2) Maximum size of partition is up to 2 TB.
3) Maximum File size is up to 4 GB.
4) File & folder Encryption is not possible

FAT:

Fat mainly for the Floppy disk drives.
It has limitations like it cannot be used for CD R DVD-R 
It doesnot have defect management. So cannot be used for CD-
RW DVD RW

NTFS:
more secure.More availability.Encryption folders are allowed

UDF:(Universal Disk Format)
used for CD DVD

Fat stands for File Allocation Table
" There are two categories in Fat File System
o Fat 16
o Fat 32
" In Fat Up To Folder Level Security is available
" Compression Option is not available
" Encryption Option is not available
" Disk Quota Option is not Available
" FAT Supported By All Of The Microsoft Based Operating 
System

NTFS

" NTFS stands for New Technology File System
" There are three categories in NTFS file System
o NTFS 4.0 - NT O/S
o NTFS 5.0 - 2000 O/S
o NTFS 6.0 - 2003O/S
" In NTFS Up-to File Level Security is available
" Compression Option is available
" Encryption Option is available
" Disk Quota Option is Available
" NTFS Supported By only Limited Microsoft Based Operating 
System