Our upgrade to Captain (from Mavericks) been postponed for long time should start these days but the process got stuck because it unclear how to safe Mavericks backups. From the point of time on when upgrade to Captain starts the existing Mavericks backups are planned to be used for roll-back if upgrade fails. Or if upgrade completes successfully but some time later user files need recovery. That means the plan is for Captain backups to start from-scratch on blank volumes, or in blank sparse bundles. For this the plan is to collect all Mavericks backups to one single USB external hdd. These are existing Mavericks backups * Time Machine, backup in sparse bundle on NAS in local network * Time Machine, backup on USB external hdd * Copy Carbon Cloner, bootable clone on USB external hdd (encrypted) * Copy Carbon Cloner, clone in sparse bundle on NAS in local network * Recovery HD clone on USB external drive produced by Copy Carbon… For all above two USB external hdd’s and two volumes on NAS are used. The goal is to collect duplicates of all them on one further USB external hdd. Duplicate of bootable clone on USB hdd should retain the boot ability. It is acceptable if it loses the encryption. The plan is also to create on the collective usb drive appropriate number of volumes, each for every type of backups (here five). It is iMac late 2013. Is the aimed goal possible to reach? Which tools are to be used? Cloning the Recovery HD to another USB drive seems to be a challenge, but not only this.