抱歉!! 剛查ㄌ一下 Microsoft, 以下是網上節錄..
* The maximum possible number of clusters on a volume using the FAT32 file system is 268,435,445. With a maximum of 32 KB per cluster with space for the file allocation table (FAT), this equates to a maximum disk size of approximately 8 terabytes (TB).

* You cannot format a volume larger than 32 GB in size using the FAT32 file system in Windows 2000. The Windows 2000 FastFAT driver can mount and support volumes larger than 32 GB that use the FAT32 file system (subject to the other limits), but you cannot create one using the Format tool. This behavior is by design. If you need to create a volume larger than 32 GB, use the NTFS file system instead.

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FAT16 --> 2048MB (2GB)
64k FAT16 --> 4096MB (4GB)
FAT32 --> 2TB (2000GB)
32k FAT32 --> 8TB (8000GB)
NTFS --> 2TB (2000GB)

Windows 2000 and XP 最多只支援 32G of FAT32, 否則請用 NTFS..