Why we use NTFS file system , is it the best file system , if you know others tell me what their advantage ,and why we use FAT with USB always ?

A- FAT32: File Allocation Table. Used for old versions of Windows ( with DOS ), but its compatible with new versions of Windows or Linux or MAC.

Size:

• - Does not support files above4 GB per file, ie, Blueray Movie10-20 GB
• - Does not support HDD above130 GB.
• - Maximum partition size is32 GB.
• -8.3 characters.

Secuirty:

• -Less secure, any user who has access to your computer can read any file on it.
• -Risk of HDD errors are greater.

B- NTFS: New Technology File System. Compatible with newer windows versions but not with MAC.

Size:

• -Support almost any size.
• -Maximum file size16 TB.
• -Uses compression to gain more space.
• -255 characters.

Security:

• -More secure.
• -File encryption and needs permissions to use the files.
• -Better recovery for HDD.

Using FAT with USB Flash is better if you use it :

1. FAT format comes as default.
2. documents and small size files.
3. Using the USB Flash on Windows or Linux or MAC OS.

It will not be a good choice if you used the USB Flash for portable software or large files.

There are different types of file systems. Disk file system, Tape file system, Database file system, Network file system etc. I think here you are asking about Disk File system.

FAT, NTFS, HFS (Developed by Apple), HPFS (File system for OS/2), UFS (File system for Unix and Unix-like), ZFS (Designed by Sun Systems), XFS (For Linux kernel) are few examples of file systems.

Mr. Thawabeyeh has given nice detailed information about FAT32 vs NTFS. Adding few points:

FAT32 file size support tops out at4GB and volume size tops out at2TB.

The maximum theoretical file size on NTFS is16 EB minus1 kB.

To wrap up, there may be compelling reasons why your current situation requires a file system other than NTFS or a combination of different systems for compatibility, but if at all possible go with NTFS.

Only reason I use FAT32 for USB is compatibility issue. FAT32 is compatible with windows (all versions), Mac, and Linux. NTFS doesn’t.

Using FAT with USB Flash is better if you use it

Using the USB Flash on Windows or Linux or MAC OS

NTFS is the new file system which is preffered for new operating systems. it has many benefits like it support large hard disk. ntfs has the capability to recover the disk related errors automaticaly which fat32 can not doing automaticaly. NTFS has better security system for permissions and access the files and folder to the specific users.

FAT32 file system is used in the earlier operating systems like win98 ,95,  2000. this file system can not used in leatest operating systems. FAT32 file system has size limitation. you can not create fat32 volumn larg then32 gb.