Apricorn Aegis Hard Drive - 120GB - 5400rpm - IEEE 1394a. Hard drive capacity: 120 GB, Hard drive size: 63.5 mm (2.5 "), Hard drive rotational speed: 4200 RPM. Operating shock: 600 G, Non-operating shock: 1500 G. Minimum hard disk space: 128 MB, Minimum processor: Pentium CPU