High-speed hard drive rotating at 10,000 RPM.

Drive that reads or writes optical discs.

Small Secure Digital memory card format.

Enterprise hard drive rotating at 15,000 RPM.

Drive that reads compact discs containing read-only data.

SD card standard supporting higher capacities than basic SD.

Shingled magnetic recording technology.

Drive capable of recording CD-R discs.

SD standard supporting very large capacities.

Conventional magnetic recording technology.