How to migrate data from Jira Cloud to Jira Server v.7.0.0

[Яна Грига]

Hey,
I'd like to know whether I can migrate all the data from Jira Cloud to Jira Server v.7.0.0? If yes, how could I do it, is there any plugin or tool to do it smoothly and fast? 
What am I going to lose if it's possible to perform it?

[Payne]

You're aware that support for Server is ending in early 2024, right?

[Nic Brough -Adaptavist-]

You can only do part of this.

If you go into the Cloud backup manager, you can create a backup of your Cloud system  and download that.

You can then restore that backup into an empty Server (or DC) install of Jira.

However

1.  You can't download Team-managed (next-gen) projects.  If you want them to come across, you'll need to make new company-managed projects and move all the issues into them.

2. 7.0 is far too old to restore a Cloud backup to.  I wouldn't even bother trying anything lower than an 8.13, and I'd strongly recommend doing it with the very latest Server version you can get (8.19 at the moment, I think)

Obviously, as a backup/restore will destroy everything in the target instance, you won't want to do this directly either, you'll probably want to do it to a development system and then do a server to server merge.  I'd be looking at tools like Configuration Manager and Project Configurator to do that