If a manual transfer is required (for mail content, a complete server after a crash, database moving, etc.), refer to the following sources:
112699 How to restore a Plesk installation on the new server after a disaster
3072 How do I restore Plesk from the hard disk drive if the Operating System is broken and the HDD with the old OS and Plesk is mounted in the new system?
1152 How to migrate Plesk data manually with Plesk Migration Manager
6518 How to migrate local database between Plesk servers manually (applicable for versions 8.x and 9.x)
6158 How to migrate Сalendar, Personal Address Book, and Horde Webmail preferences manually
5882 How to migrate Plesk and SiteBuilder content and retain Plesk and SiteBuilder integration (applicable for versions 8.x and 9.x)
Steps
How do I restore Parallels Plesk from a hard disk drive if the Operating System is broken and the HDD with the old installation is mounted to the new server?