I guess you didn't search hard enough?
https://www.britannica.com/technology/hard-disk
"In addition to referring to the disks themselves, the term hard disk is also used to refer to the whole of a computerâs internal data storage. Beginning in the early 21st century, some personal computers and laptops were produced that used solid-state drives (SSDs) that relied on flash memory chips instead of hard disks to store information."
https://en.wikipedia.org/wiki/Hard_Drive
"Hard Drive may also refer to:
Solid-state drive, a computer storage device that has no moving parts"
https://experience.dropbox.com/resources/what-is-a-hard-drive
"What is an SSD?
SSDs (solid state drives) are the newer of the type of hard drive. They have become the preferred format for high-end laptopsâ internal hard drives, and all smartphones and tablets also use a form of SSD."
Back when hard drive was first used, it meant any non-volatile type of storage that was 'hard', I was literally there. When people talked about HD, they meant computer storage since HD tvs werent even a thing. Now go relax man, no need to get all fussed about this simple discussion, you started this just because I said that calling an SSD a hard drive isnt wrong, which it isnt, but calling if HDD is because that implies a disk, thats all.