When copying files in Sharepoint (https://support.office.com/en-us/article/Move-or-copy-a-folder-file-or-link-in-a-document-library-00e2f483-4df3-46be-a861-1f5f0c1a87bc) it should retain the version information of the files moved rather than just creating a new version of the file, basically making the latest version, 1.0.

This is a useless feature at the moment as it only serves as another method to copy files between sites and is no different than downloading them and uploading them to another site.