Good Morning.
When you agree to "Care Everywhere" that should give your Mayo team access to all of the institutions that are listed. I would suggest following up to make sure that the records are transferred, and you understand the process. Bringing paper and CDs in on the day of your appointment might slow your check in process and if they need to be reviewed before your visit. They may be upload able from home. Best case is to use the collaboration among hospital systems to share records. If an institution does not share information, then you will need to get records the "old fashioned" way.