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