With Exporter, you can select the extra content that you want:
If your issues have attachments, you can include them to download in a separate folder.
Export the issues comments. You will have the comment's date, author and message. Also, you will have the security of the comment Public or Internal and the name of the group or role.
Export the workflow trace that each issue follows. For example: perhaps an issue has started in To Do, then it was moved to Doing and it has ended in Done.
Initial status date: The date in which the initial status is established.
Time in initial status (sec): Time in the initial status before the transition in seconds.
Initial status: Initial status of the transition.
Final status: Final status of the transition.
Transition date: When the transition is done
Transition user: The user who did the transition
Times: How many times the same transition has been done?
Time in final status (sec): Time in the final status before the transition in seconds.