For the most part, neither. The default file system for Windows XP is NTFS. You can choose to use FAT32 on drives less than 32 GB in size, but there's little advantage to do so.
If you intend to install the hard drive as a second drive, Windows 98 may not be able to recognise it. Windows 98 runs only with the Fat 32 file system, where as normally XP runs on the NTFS file system, but can also run on Fat 32
FAT 32
Windows 98 supports FAT filesystems only. Windows XP supports FAT and NTFS filesystems.
Windows NT4 supports: FAT, NTFS (version 4) Windows 2000 supports: FAT, FAT16, FAT32, NTFS (versions 4 and 5)
Yes, they do. Windows ME even supports Fat 32!
FAT and directory
FAT, FAT32, NTFS - and with Windows 8 and Windows Server 2012, Microsoft introduced WinFS.
windows is designed to run with NTFS (new technology file system) but can still run with FAT but a hard drive that is bigger than 32gb should not be formated with fat 32, anything over this should be NTFS.
FAT is a file system used by MS-DOS and other Windows-based operating systems to organize and manage files. The file allocation table (FAT) is a data structure that Windows creates when you format a volume by using the FAT or FAT32 file systems. Windows stores information about each file in the FAT so that it can retrieve the file later.
FAT and FAT32
Yes.
Any FAT and NTFS.