Freecom ToughDrive Pro 2.5 ToughDrive 2.5" Pro 40GB, 40 GB, 2.5", 2.0, 4200 RPM Freecom ToughDrive Pro 2.5 ToughDrive 2.5" Pro 40GB. HDD capacity: 40 GB, HDD size: 2.5". USB version: 2.0. HDD speed: 4200 RPM