1) From the vSphere Client Edit Setting of either the Virtual Appliance (VA) or the vRanger VM (whichever is used for Hot-Add)
2) Click on the disk that is added to the VM (upper right (path) can confirm what disk it is)
3) Click on Remove (***Do not delete from disk***)
4) Repeat for all the disk that should not be attached
5) From vRanger run the backup job again