Toshiba HDD2168 20GB MK2018GAS ・Brand: ‎Toshiba (TOSHIBA) ・Item model number: HDD2168 ・HDD capacity: ‎20 GB ・HDD interface: ATA ・Cache: 2MB ・Hard disk rotation speed: ‎4200RPM ・Drive size: 2.5 inches This is the internal hard drive from a Mac I used previously. While there are scratches and wear and tear overall due to age and use, the device (HDD) functionality was confirmed to be normal based on a device manager check (photo 3).