 Therefore, although cluster addresses were 16 bits, this format was not what today is commonly understood as FAT16.A partition type 0x04 indicates this form of FAT16 with less than 65536 sectors (less than 32 MiB for sector size 512).With the initial implementation of FAT16 not actually providing for larger partition sizes than FAT12, the early benefit of FAT16 was to enable the use of smaller clusters, making disk usage more efficient, particularly for large numbers of files only a few hundred bytes in size.