Double post.
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You do not have to backup emunand or sysnand, you have to restore it. (edit. Sysnand. You gotta restore sysnand)
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He doesn't need to backup sysnand, he's already installed a9lh, he only needs to restore the original one.
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I mean, he can delete those files, but he doesn't need the space, he needs to restore sysnand. What he does need to do is copy the full contents of the card to the pc, format the card to fat 32, then copy the files in again, and try to restore sysnand. Restore, not backup.