Attribute

FAT12

FAT16

FAT32

Operating System

DOS

Windows 3.x

Windows 9x

Used For

Floppies and very small hard disk volumes

Small to moderate- sized hard disk volumes

Medium-sized to very large hard disk volumes

Size of Each FAT Entry

12 bits

16 bits

28 bits

Maximum Number of Clusters

4,086

65,526

~268,435,456

Cluster Size Used

0.5 KB to 4 KB

2 KB to 32 KB

4 KB to 32 KB

Maximum Volume Size

16,736,256

2,147,123,200

2,199,023,255,552