Hi Grant
Thanks for chiming in but I have about 60GB, maybe a little less on the MacBook Air. The issue is with Big Sur not earlier version.
I am sure that I am not alone when I say this. The affected printer drivers worked before the Big Sur upgrade. They stopped working as a result of Big Sur, I think Apple (I have no actual evidence) has double down on security and/or parts of the installer are not compatible with Big Sur.
As it was, the first time I chose to Print I immediately confronted a Mac OS security message (something about a Postcript and a PDF issue) and was guided to an HP webpage to download an uninstaller. After uninstalling, I found that trying to add a printer would bring up another security message, something related to FAX. The file was located where the printer drives use to be, it looks like the uninstaller did not remove everything.
Printing system reset, https://support.apple.com/guide/mac-help/reset-mac-printing-system-solve-a-problem-mh14001/11.0/mac/11.0
reviewed https://support.apple.com/guide/mac-help/solve-printing-problems-on-mac-mh14002/mac
I will try safe boot and a new user account but not today. I will report back but I do doubt there will be a solution. I think it really is Big Sur being hardcore about security and enforcing it with no recourse.