Hi, Im wondering the same thing, even though manufactures always quote GB in 1000of MB instead of 1024MB the 60Gb PS3 I bought still only reduces down to an actual physical size of 58.5Gb.

Thats a huge dispararity when 2 days after I bought the thing its showing me it only has 47 of 60 gb available.

The unit itself has run a couple of movies and played both RR7 and Fall of Man, neither of which has been installed to the hard drive.

What on earth is taking up the other data space? I can find no data on the drive, am I to assume that the Hard drive is an integral part of the operating firmware of the unit. In which case the poor $^%!^ with the 20gb wont have much space for anything.

It makes no sense and I can find no documentation online anywhere to state what is on the drive. Ive toyed with the Idea of upgrading the drive, its a fairly straightforward process but as I dont need the space theres no point. Still all said and done itd be nice to know what on earth Sony put on it that takes up so much space.

Even windows xp with a full application suite doesnt take up that much space on a hard drive.