Comment # 3 on bug 1103391 from Arvin Schnell

AFAIS you try to import mount points from a system. Apparently the fstab
of that system contains a filesystem with type ntfs-3g (the fstab is not
logged) and the code in yast2-storage-ng tries to create a filesystem
then (I am not familiar with that code). Anyway, create_blk_filesystem
expects NTFS not NTFS3G as argument so create_blk_filesystem throws an
exception.

create_blk_filesystem could treat NTFS3G as NTFS but several other enums
of FsType can also not be used in create_blk_filesystem, e.g. NILFS2,
HFS, HFSPLUS, AUTO, TMPFS, MINIX and UNKNOWN.

You might try to edit the fstab and replace ntfs-3g with ntfs.