The Add new disk summary contains a list of briefly described operations to be performed on partitions (disks).
After you click Proceed, Acronis True Image Home will start creating new partition(s), indicating the progress in a special window. If you stop this procedure by clicking Cancel, you will have to repartition and format the new disk or repeat the disk add procedure.
Before clicking the Proceed button you can use the sidebar to navigate through the Add New Disk Wizard steps and make changes.