This is a really handy item indeed. Lacie doesn't specify the spin speed, which normally means 5400RPM. It didn't take long to find out that in this lovely black box the hard drive is indeed 5400. I had to take it apart for data recovery and was quite surprised, or not, that the hard drive is not the higher speed one.
Not Lacie's fault I believe, because they didn't say it was, but beware of the money-grabbing retailers.
There's a reason for not needing high performance hard drive and that is the interface's speed. Lacie's website says: "Typical transfer rate : up to 8 MB/s, depending on file sizes and formats, LAN configuration and other factors"
That is up to 64MBit/sec, which is slower that USB1.1 and after I tested it I can clarify it is not a single bit faster.