I am using QB for Mac 2019 desktop. I have been using a new Mac Air since February and have had no issues accessing my master file until 2 days ago (May 2). When I closed out of QB on the 2nd I got the error message referenced above ("QuickBooks was unable to back up your company file.  QuickBooks could not copy the company file"). I now get this message every time I close the program. 

I can still add transactions to the master file and, after I close the QB (and am told that QB was unable to back up), I can log back into the program and see the transactions I have added.

It seems that the information is being backed up, but telling me that it is not being backed up. I feel like I am going to login one morning and learn that the last few months of entries have disappeared.

Anyone have any info on this odd error?   Thanks.  

-Scott