Please have a look at this guide: https://confluence.atlassian.com/adminjiraserver/importing-data-from-csv-938847533.html
You will need the issue key and also need to specify which project the attachment are to be imported to.
When you say using the same export from Jira, please note that the Jira export would be in a specific format you decided to export in(JSON, Excel, CSV,etc) after exporting you still need to ensure the data is formatted correctly in a format acceptable by the other Jira instance.
Do a test export on a staging server before attempting this on your production server.
Hi @Ismael Jimoh ,
the available format for the export doesn't allow to export 'Attachment' of the issues (infact it isn't a field that you can select in the Filter Coloumns).
The question is: do you know any way to export Attachment from Jira using the Native Jira export?
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