There will be no significant difference. However, if you use the XP conversion utility to convert FAT32 to NTFS, there WILL be a difference, it'll be much SLOWER! The reason is that the conversion utility, due to an obscure disk block alignment issue, will create 512 byte clusters on the NTFS volume. This is a significant performance issue. There is a work-around for the XP/W2K conversion utility, and you can use something like Partition Magic that doesn't have this problem. OTOH, unless you feel a burning need for NTFS, I'd just leave it alone.