In addition to using the Migration Manager function of Parallels Plesk Panel for transferring data online from another server, you can use the Migration Manager utilities to gather the data you want to transfer from a source server, store them as archive files, and then import these data to a destination server.
<parallels_plesk_panel_installation_directory>/PMM/Agents/PleskX/ on Linux/Unix-based servers, and in <parallels_plesk_panel_installation_directory>
\PMM\Migration\Platforms\UnixShared\PleskX\ on Windows-based servers. This procedure is described in the section Importing Data From Linux/Unix-based Servers.