How to export and import data from an existing JIRA Product Delivery environment to the other one?

[Nagasaka Goro]

I have moved most of an existing JIRA environment to the new JIRA environment.

Under this circumstance, how can conduct data copy from an existing one to new one without choosing CSV file import and export solution?

[Prachi Bolar]

Hello,

Welcome to Community :) 

Apart from what Trudy has shared you can also check import export opition incase you want to import only some issues from one instance to another : https://support.atlassian.com/jira-cloud-administration/docs/import-and-export-your-data-to-and-from-jira-cloud/

Thank You.

Prachi

[Trudy Claspill]

Hello @Nagasaka Goro 

Welcome to the Atlassian community.

Have you looked at this option?

Copy Jira data