I have created a project on Jira free version, and we now need to migrate this project to our client's cloud, where they have a paid version of Jira.
Each user story contains added fields like 'test script' and 'acceptance criteria'. Furthermore, the complete history (peer review comments) is in the comments section. And we also have lots of attachments in each story.
Our IT support tells me I can export the comments, but I cannot import them on the client's Jira. Any clue how to do this without manually needing to update >200 user stories?