import attachment and to jira for using JIRA import wizard

[kalpa]

we are trying to migrate to Jira service desk from Zendesk.

For this process we are using JIRA import wizard in External System Import.

but their i have a issue of uploading attachments and communication tread to Jira.

(my aim is to download the attachment files/ and communication thread  physically respected to each ticket and try to upload them in to jira System.

How can i achieve this