Plugins like Project Configurator or Configurator Manager for Jira DataCenter helps to perform Jira Cloud Migrations to Server using the backups created by the "Backup for Server" functionality. But this will be discontinued on November 24.
So I am looking for alternatives once that this functionality is discontinued.
It seems that Atlassian will continue offering the ability to export issues and their content, but there's not a clear view of what will happen with the attachments export.