SpanBurner doesn't replace backup utilities (see caution box, below). Rather, it's for when you really need to write discs that follow normal file-system conventions.
SpanBurner is very clever about splitting folders while keeping the folder hierarchy intact, but possibly duplicated on different disks. But it won't split files. If a single file is bigger than will fit on a disc (4.6 GB or so for DVDs), it stops with an error.
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