>I bought a portable/external hard drive to use as a backup of my notebook hard drive. The portable/external drive is formatted FAT32 but my drive is NTFS. Will I have any problems if I XCOPY files from the NTFS drive to FAT32 drive and possibly (in case of a crash) restore files back to NTFS?
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>Thank you in advance for any input.

You should not have any problem.

You could reformat the external drive to NTFS, but for a simple notebook backup it should do OK.