File System Of FAT32

The basic FAT32 file system is characterized as file allocation table (FAT), which
is really a table that resides at the very “top” of the volume. A section of disk at the
beginning of each partition is set aside to contain the table. The table has one entry for
each disk block, and is indexed by block numbers. The FAT is used much as a linked list.
The directory entry contains the block number of the first block of the file. The table
entry indexed by that block number then contains the block number of the next block in
the file. The chain continues until the last block, which has a special end-of-file value as
entry.

 FAT32 File System Library

FAT Naming convention
FAT uses the traditional  file naming convention and all filenames must be
created with the ASCII character set. The name of a file or directory can be up to eight
characters long, then a period (.) separator, and up to a three-character extension. The
name must start with either a letter or number and can contain any characters except
for the following: 

. " / \ [ ] : ; | = , 
If any of the above characters are used, unexpected results may occur. The name
cannot contain any spaces. 
The following names are reserved: 
   CON, AUX, COM1, COM2, COM3, COM4, LPT1, LPT2, LPT3, PRN, NUL
Both FAT16 and FAT32 have the capability of VFAT. VFAT is a technical term for a
long file name. VFAT allows up to 255 characters for a file name instead of the file
name as discussed.