This is what I sould have asked and how I sould have asked it.
If you want to know the Largest Hard Drive Size FAT 16 can support
You take the Largest Cluster Size it can have 32 kB X the Maximum Numbers of Clusters it can support 65,536
32 X 65,536 = 2. GB = 2. GB and you have 2. GB Hard Drive.
Now If you want to know the Largest Hard Drive NTFS can support you would do the same.
Take the Largest Cluster Size it can have 64 kB X the Maximum Numer of Clusters it can support witch is way to many RIGHT.