I am going to take Mint down for about 30-45 minutes to make a backup prior to upgrading from Mint 20.2 Uma to Mint 20.3 Una.  Mint upgrades have been fraught with problems in the past so want to make a backup first just in case it ends up in an unrecoverable situation.   Once backup is completed it will be available though there may be some restarts needed during the backup.