thanks for your response. I admit all of this is rocket science to me, being a writer and not a techie. I found code for terminal online, it did nothing. then I tried SIP, but it did not allow me to access terminal, only the tools used in recovery mode. so not sure what to do. maybe call apple, but they charge for help, even if the problem is theirs, like Catalina not dumping update files hogging up 40 gigs on a 250 gig hard drive. thanks again for your response!