This is the documentation of JSU for Jira Cloud. If you are using JSU on Jira Server/Data Center, see our JSU Server/Data Center documentation.
The 'Copy / Move Attachments' feature is available from JSU 2.8.0
This post function will copy attachments from/to all related issues. You can define which issue should be a source and which is a destination. Any number of attachments can be copied to the related issue(s).
You have different options for defining define which issue/s will be treated as source/destination for attachments. Several of JSU's workflow modules provide the option to define the scope of the module on some related issues.
For example, instead of copying attachments from one issue to the others, you might choose to copy them from all linked issues to the issue in transition (e.g. to group all attachments within one issue)
Conditional copying attachments
Conditional copying attachment (controlled by custom field) is always only checked for issues in transition, regardless of whether the issue in transition is a source or destination.
See the Copy/Move attachments use case for an example of how some of our customers use it.