Halo Reach Skulls Found

Ok there are no hidden skulls in Halo Reach campaign. But don't fret for Bungie hid a whole bunch of data pads for us to fine. Now it looks as if there are 18 data pads. Half of them can be found on any difficulty level while the other half are considerably harder to find and can only be found on Legendary. Halo Reach Data Pad Locations