Hard Disk Drives, hard drives or HDD are a hardware device that stores and retrieves data on your computer.
Data can be written, deleted and re-written to these drives.
If you broke one apart and looked inside you’d see one or more platters to which data is written using a magnetic head.
Kahlal “KC” Cunningham of Madison Geeks appeared on a January 2017 Channel 57 CW57 WIFS Madison Girl Talk segment to talk about computer hard drives and SSD.