Samsung SFD-321B/LFEB. Drive device speed: 300 RPM. Mean time between failures (MTBF): 30000 h. Compatible operating systems: Windows XP/2000/ME/98/98 SE Mac OS X 10.2 Mac OS X 10.1 Mac OS 9.x Mac OS 8.6. Weight: 460 g. Operating temperature range (T-T): 5 - 40 °C, Storage temperature range (T-T): -40 - 60 °C, Operating relative humidity range: 20 - 80 %