linux – tar archive error message

I receive a following error when archiving the root directory of the user.
(try to migrate a user from one macbook to another since the user's keys are associated with AWS and other tools)

tar cfv user1.tar –exclude & user1 / downloads & # 39; user1

tar: deferred error output from previous errors.

After archiving, approximately 70% receive the error message above.

I have read many documents and tried all the advice but I still get the same error.