Hello there!
Generally, the image is in the system disk whose size is less than 50G.
The image does not contain the CBS EVS disk. The system image and EVS snapshot are two things. If the image is an EVS disk, you can use the snapshot function to create an EVS disk based on the snapshot and then migrate the EVS disk to the new host or mount the EVS disk to the new host. (It is recommended that important data be exported first).