The typical acronyms and phrases are `HDD` for `Hard Disk Drive` and `SSD` for `Solid State Drive`. 

The generic "parent" term is `DD` for [`Disk Drive`][1]. 

Adding to this list is `FDD` for `Floppy Disk Drive` (remember those?), `ODD` for [`Optical Disk Drive`][2] (more common terms are CD, DVD & Blu-ray Drives though), [`Tape Drive`][3] and [`USB Flash Drive`][4].


  [1]: http://en.wikipedia.org/wiki/Disk_storage
  [2]: http://en.wikipedia.org/wiki/Optical_disc_drive
  [3]: http://en.wikipedia.org/wiki/Tape_drive
  [4]: http://en.wikipedia.org/wiki/USB_flash_drive