Source disk volumes can be cloned to the target disk "as is" or resized proportionally.
It is recommended not to format the source hard disk after the cloning until you are sure that the cloned target disk boots fine.
It is possible to clone a larger disk to a smaller one, provided that the smaller hard disk has enough capacity to fit the contents of the larger disk.
(!) If you clone a disk with Windows to external USB hard drive, you will not be able to boot from it. Windows does not support booting from external USB hard drives. Please clone to internal SATA SSD or HDD instead.
If you are going to do system disk cloning, it recommended to do it from Acronis Bootable Media.
Even when you start cloning in Windows, the computer will reboot into the Linux environment the same as when booting from the rescue media. Because of this, it is better to clone under rescue media. For example, there may be a case when your hard disk drives are detected in Windows and not detected in Linux. If this is the case, the cloning operation will fail after reboot. When booting from the rescue media, you can make sure that Acronis True Image 2015 detects both the source and target disks before starting the cloning operation.