As you now have a understanding of clonezilla, clone the whole drive at the same time, as all the un,allocated space will be at the end of the drive. You will then be able to use gparted to move partitions into that space then resize as needed
As you now have a understanding of clonezilla, clone the whole drive at the same time, as all the un,allocated space will be at the end of the drive. You will then be able to use gparted to move partitions into that space then resize as needed