DataStor - Fast DataStor - Fastest DataStor SATA - Fast DataStor SATA - Fastest Max Capacity 160GB 100GB 320GB 200GB Interface Type Hi-Speed USB 2.0 Hi-Speed USB 2.0 Hi-Speed USB 2.0 Hi-Speed USB 2.0 Rotational Speed 5400RPM 7200RPM 5400RPM 7200RPM Dimension 5" x 3" x 0.5" (l x w x h) 5" x 3" x 0.5" (l x w x h) 5" x 3" x 0.5" (l x w x h) 5" x 3" x 0.5" (l x w x h) Data Buffer 8MB 8MB 8MB 16MB Average Seek 11ms 10ms 11ms 10ms Back up Average Good Very Good Excellent File sharing Average Excellent Excellent Excellent Mobility Good Good Excellent Very Good Video/Audio Storage Average Average Very Good Excellent Video/Audio Stream Average Good Very Good Excellent Recommended For those who need a daily back up on a budget For those who do large transfers professional level quality. For those who need that extra space for multimedia: video, audio, photos, etc. Professional grade. Can run 24/7/365, high resistance to heat/cold