I have no first hand experience with LaCie, as we never actually used or tested these. However, from what I just read,
I suppose it has no filesystem of its own. The filesystem is controlled by a host machine to which the drive is attached.
So if you have a Windows system, you should
- get ZAR evaluation here - www.z-a-recovery.com/download.aspx
- run ZAR as described in the unformat tutorial
and proceed as described in there.