The "Importing Data from Trello" help article states that if you have access to Jira Software:
- Any cards in Trello that have been archived will not be imported.
- Archived Trello lists and their cards won't be imported.
- Any checklists created in Trello won't be imported.
It says if you don't have Jira Software the above will be imported.
How can you import the Trello information without the Jira software?
How can I import the archived cards and checklists from the other cards?