A quick grammar nazi question - is the “disk” a typo or one of the examples of US English vs. UK English?
Disk is used for magnetic storage devices, like traditional HDD’s, and disc is used for optical storage devices, like CD’s etc. (in the US at least,no clue about other parts of the world). For LaserDisc though, that was just what it was called either way. It was a marketing/branding term specific to the product invented by Pioneer, it’s its own word.