You can perform a search in JIRA (take the same filter as your board filter / optionally exclude completed issues or issues that are in a current sprint) and export all of the returned values to Excel. There you can convert the values into a CSV file:
Also you could check this answer here:#https://answers.atlassian.com/questions/84144
You can use Shift + Left click on the first issue followed by Left click on the last issue in the backlog-screen and than right click to export to Excel or other possibillities. See GreenHopper 6.2.2 release notes for more info. In Excel you save the file as .csv
Could not find an easy way to do this, so here is what I did:
Learn how to use two new reports for next-gen projects in Jira Cloud: Cumulative flow diagram and Sprint burndown chart. Ivan Teong, Product Manager, Jira Software, demos the Cumulative ...
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