Toshiba MQ01AAD010C MQ01AAD-C Series 100GB 4200RPM SATA 3Gb/s 8MB Cache (512e) 2.5-Inch Hard Drive Storage Capacity 100 GB Cache Storage 8 MB Maximum Data Transfer Rate 3 Gb/s Disk Format 512e RPM 4200 Drive Type Internal Drive Width 2.5"